In the Name of Allah, the Most Gracious, the Merciful.  
             
            Background
            The Shia belief centers around the Imamah of Ali and the line of   Imams after him. This belief is considered by the Shia to be one of the   five Usool-e-Deen (fundamentals of religion), and in fact they claim it   to be the most important of them. Allamah Muhammad Husayn al-Kashiful   Ghita writes in his book “The Origin of Shi’ite Islam and its   Principles” (Asl ash-Shi’ah wa Usuluha):
            “Those matters which concern knowledge or wisdom, are called   Usool-e-Deen (fundamentals of religion) and they are five: Tawheed,   Nabuwwah, Imamah, Adl, and Ma’ad.”
              (“The Origin of Shiite Islam and its Principles”, Part II:   Fundamentals of the Religion, Part II: The Fundamentals of the Religion,   Section The Fundamental Beliefs, p.218)
            
            Wilayah (i.e. the designation of the Imam) is considered a more important pillar than prayer, fasting, zakat, or hajj:
            “Islam is founded on five pillars: prayers (salat), zakat, hajj,   fasting (sawm), and wilayah.” Zurarah asked the Imam: “Which one is the   most important?” The Imam answered: “Wilayah is.”
              (Wasa’il al-Shia, Vol.1, p.40; Usool al-Kafi, Vol.1, p.462)
            
            Denial of this doctrine (i.e. Imamah of the twelve) is considered by   the Shia to be Kufr (disbelief) and one of the reasons that the Sunnis   will be damned to eternal Hellfire in the next life. Shaykh Mufid   declared in no uncertain terms:
            
              Shaykh Mufid says
              “اتفقت الامامية على أن من أنكر إمامة أحد من الائمة وجحد ما أوجبه الله تعالى له من فرض الطاعة فهو كافر ضال مستحق للخلود في النار”
                Translation: “The Imamiyyah [Shia] are in agreement (’Ijma) that the   one who rejects the Imamah of one Imam and rejects the obedience to them   which Allah ordered is a misguided Kaffir deserving to remain in   Hell-Fire forever.”
                
               
            
            And yet, despite the overriding importance of this doctrine, we find   absolutely no mention of the Imamah of the twelve in the Quran. None of   the twelve Imams are mentioned in the Quran, nor is the doctrine even   alluded to. How is it then that the central doctrine of the Shia cannot   be found in the central book of the Muslims, i.e. the Quran? In the   early times of Islam, this was the question that the Sunnis would ask   the Shias. To this, the classical Shias responded by accusing the   Prophet’s Companions (the Sahabah) of tampering the Quran, claiming that   the Sahabah had removed entire verses and chapters from the Quran,   including the Surah al-Wilayah which declared the Imamah of Ali ibn Abi   Talib. This was the Shia belief of Tahreef (tampering/corruption)   whereby they claimed that the present Quran we have today was incomplete   and the complete Quran was hidden away with their Imam Mehdi who would   reveal it at the End of Times.
            This belief of the Shia was a direct violation of the Quranic verses   which clearly said that (1) the Quran is complete and (2) that Allah   would protect it from corruption. This belief that the current Quran was   incomplete was of course considered by the mainstream Muslims to be   Kufr (disbelief) and the Sunnis thereby declared the Shias to be   apostates to be executed for grand heresy. And this was when the Shias   invoked another one of their blasphemous beliefs, i.e. Taqiyyah. The   Shia Maraje’ (top scholars) agreed that the belief that the Quran is   incomplete would be too dangerous a position to pronounce publicly, and   that it would threaten the very existence of the Shia. They feared that   the Shias would be executed by the state on charges of grand heresy, and   it was thus that for thousands of years the Shias would publicly deny   that they believed that the current Quran with us today was incomplete.
            And yet, despite this denial, the belief–that the current Quran was   incomplete–persisted in their books. Even though the Shia scholarship   hid this belief from their own awwam (masses), they themselves held onto   it, and today we find this belief of Tahreef in many of their classical   books. It remains a belief held by the Grand Ayatollahs of Shi’ism, but   something which they do not declare publicly. The Shia propagandist has   become so adept at denying the very existence of this belief that he   has successfully fooled the Muslim masses. Most Sunni laypersons today   do not believe us when we warn them of the Shia belief, and instead they   are fooled by the Taqiyyah of the Shias. And yet, all the experts on   Shi’ism know the truth, and we continue to expose them and reveal their   true beliefs, hidden under the cloak of Taqiyyah.
            Answering-Ansar’s Guru: Allamah Abdul Kareem Mushtaq
            One of the most popular Shia propaganda sites, Answering-Ansar, has   led the charge in denying the belief in Tahreef. The Answering-Ansar   website has become the flagship of the Shia propaganda juggernaut in the   English language. How many dozens of Sunni laypersons have been led   astray by their half-quotes, misquotes, and blatant lies? So it is today   that we expose Answering-Ansar and reveal their true colors, and warn   the mainstream Muslims of what lies underneath the facade. It is our   sincere hope that this will once and for all convince those ignorant   Sunnis who call to unity with the Shias, who refer to them as fellow   Muslims, and who say such silly things as “the Shia only differ with us   on very minor things.” No, these Shia scholars say that our Quran is   incomplete and not enough, and they are on the same position as the   Qadianis! In fact, not even the Qadianis dared to utter such things   against the Quran; we will see how the Shias have gone so far as to say   that the real Quran has a verse in it in which the name of Pakistan is   mentioned. This is a claim that not even the leader of the Qadianis   made.
            The Answering-Ansar website was inspired by the Shia scholar, Allamah   Abdul Kareem Mushtaq. He was a contemporary scholar who lived in   Pakistan and preached throughout the 1980s and 1990s. It was Allamah   Abdul Kareem Mushtaq who was a heavy influence on Answering-Ansar’s   work, and for all intents and purposes, he is seen by them as their   guru. Answering-Ansar has spent a lot of its time translating his works.   Let us read a few quotes from Answering-Ansar’s website wherein they   praise the Allamah and detail their relationship with him:
            
              Answering-Ansar says
              These one hundred questions are from the pen of   Allamah Abdul Kareem Mushtaq, a name that needs no introduction for Urdu   readers. A former Sunni scholar that converted to Shi’a Islam in the   late 1960’s, he dedicated his entire life to defending the path of   truth. Author of over thirty books, the vast bulk of his works were   rebuttals to Nasibi texts attacking the Shi’a, and he managed to silence   many leading lights of Mu’awiya’s cause, such as Dost Muhammad Qurayshi   and Qadhi Mazhar Husayn. A continual thorn in the flabby sides of the   Nasibi, the inability of the Marwani Mullah’s to refute his books, led   to them seeking to ban his books through Court on the grounds that they   constituted ‘disrespect of the Sahaba’. Despite such efforts, he   continued his mission undeterred by Nasibi hate mail and death threats.   Some of his most notable books include Furu-e-Deen, wherein he presented   one thousand questions for the Ahl’ul Sunnah Ulema to refute and Chodha   Masalai (replies to 14 questions typically raised against the Shi’a).
 A great orator as well as a prolific writer thousands of people in Pakistan converted to the path of truth, through him.
                 
                Unfortunately this fact, coupled with the spectacular inability of   the Nasibi to refute his books, made him a direct target, and they   silenced him in the only way that followers of Mu’awiya can, by fatally   shooting him in Lahore in the mid nineties. Despite this tragedy   his memory lives on, his writings continue to act as a huge source of   inspiration and guidance for the Shi’a, and the Answering-Ansar.org team   have been heavily influenced by his excellent texts.
                These questions form the second portion of Abdul Kareem Mushtaq’s   book, Usul-e-Deen. Although we have translated this book, it was felt   that these one hundred questions are best placed as a separate document   under the challenge section. Whilst the Allamah had cited Urdu editions   of books, we changed the text, referring to English editions, to ensure   that these references can be located more easily.
                May Allah (swt) reward Allamah Abdul Kareem Mushtaq for his   efforts and grant him Paradise with the Imams (as). May his legacy (his   books) continue to act as source of guidance for us all. May Allah (swt)   also accept our intention, and bless Prophet Muhammad and his purified   family.
                  Illahi Ameen.
              source: 
http://www.answering-ansar.org/challenges/100questions/en/index.php
            (Note: It should be known that when the Shias say the word “Nasibis”,   then they mean us Sunnis. Is it any wonder that these rejectors of the   Quran have any basis to attack the rightly guided Ahlus Sunnah, and have   the gall to refer to us as “Nasibis”?)
            We urge our readers to save screen-shots of Answering-Ansar lest they   resort to their traditional strategy of making these articles   disappear, all in the time-honored tradition of Taqiyyah.
            Elsewhere, Answering-Ansar says:
            
              Answering-Ansar says
              
                Abdul Kareem Mushtaq proved himself a prolific   writer and wrote at least 40 other books that refuted all the lies   churned out by the Nasibi propaganda machine. He was responsible for   converting scores of people to Shi’aism and was his achievements will   always remain in our minds. Whilst the followers of Mu’awiya sought to   silence him by banning some of his books and then killing him, the   writings of this great martyr are still readily available in the Indian   Subcontinent and continue to bring people to the path of truth. We pray   that his wonderful book act as a means of approach in the next world,   and that Allah (swt) grants him Paradise in the company of the Ahl’ul   bayt (as) – Ameen..
                
               
            
            One of the famous books written by Allamah Abdul Kareem Mushtaq is   “Hazaar Tumhari Dus Hamari”, a book in which the Allamah attempts to   refute Sunni allegations and give many replies to the Sunnis. We have   taken the liberty of opening this book, considered by the Shia to be a   masterpiece work. Let us now expose the beliefs of this Allamah, and   show to the world what these people believe! Let us unmask   Answering-Ansar and shatter their reputation. Let us warn and advise   those who believe in the Quran, who believe that the Quran is complete   and sufficient for the Muslims.
            When we open up the Allamah’s book and turn to pages 553-554, then we   find that the Allamah claims that the Quran we have today with us (i.e.   the Quran in its present form) is incomplete andinsufficient. He says that the Shia belief is that the complete Quran   is not with us but it is with Imam Mehdi who will return at the End of   Times to reveal it. The Allamah then explains why our current Quran is   incomplete and insufficient, claiming that the complete Quran with Imam   Mehdi meanwhile has everything in it, including the name of Pakistan!   Subhan-Allah, do we not see what heretics the Shias are; this is that   sect which claims that the real Quran has the name of Pakistan in it!   Then finally, Allamah Abdul Kareem Mushtaq attacks the Sunnis for not   believing in this complete Quran, and he accuses the Sunnis of only   believing in the incomplete Quran (i.e. the present Quran) and not the   invisible one with Imam Mehdi.
            We are afraid that this is a blow that Answering-Ansar cannot recover   from! Let us proceed forth and expose them. Without further ado, we   present to the reader the words of Allamah Abdul Kareem Mushtaq, the   guru of Answering-Ansar:
            
            
            Scan and Translation Provided Courtesy of A. Ansari
            Translation
        
          Allamah Abdul Kareem Mushtaq says: “They (Shias) also accept this   (present Quran) as the Word of Allah, whereas you (Sunnis) only accept   that (Quran) which is present and deny the one that is absent. So whose   Quran is intact: yours or ours?”
          (Sunni) Objection 874:
          “In Tafseer Safi, (you Shias claim that) Hadrat Umar asks Hadrat Ali: do   you also know when the real Quran will be revealed? Hadrat Ali said:   Yes, when from my children, Imam Mehdi will rise, he will present that   Quran. (Tafseer Safi, 10/33) So from this, we find out that Hadrat   Mehdi’s Quran is one thing and our present Quran is another; therefore,   the one (Quran) that you (Shias) believe in is not present and the one   that is present you don’t believe in it!”
          Answer 874 (by Allamah Abdul Kareem Mushtaq):
          No doubt the Quran that is with Imam Mehdi is complete. It has in it   all Mansukh verses as well as the present verses in the same order they   were revealed and all explanatory notes and explanations are present in   it. It has the complete interpretation of the Prophet. It has in it all   the issues of past, present and future. And in that complete book   everything wet or dry is mentioned in it. And you people (Sunnis) don’t   believe in that properly ordered Quran and only believe in this present   Quran which according to you has lost a large part of it. That means   that your (Sunni) belief is weak, whereas we (Shias) believe in that   complete Quran which was never separated from the Ahlel Bayt.
          That is why in the Times of Justice (i.e. the End of Times) this   Quran would appear and will defeat falsehood, and it will prove Allah’s   Promise that this Quran has explanations of everything dry and wet in it   and then not even any impure person can corrupt it. But only the pure   can touch it. When Imam (Mehdi) will reveal this Quran to the world,   falsehood will vanish from this world and Truth will rule.
          The Holy Quran we have now with us (i.e. the present Quran) contains   verses of that same Quran (that is with Imam Mehdi) but its order of   verses is not the same, and it also does not contain the explanations   given by the Prophet. When we accept the present Quran as the Word of   Allah, then how can you doubt our belief? The weakness of belief   is present in your (Sunni) religion who only believe the present Quran   to be enough, and don’t believe in that part which is invisible. However, they admit that a large part of the Quran went wasted but they don’t believe this lost part as the Word of Allah, but rather by denying it, they (the Sunnis) believe in a weak Quran.
          Our belief is on both the visible (verses) and invisible (verses). So   we (Shias) are complete in beliefs, whereas you (Sunnis) believe in the   visible (verses), and deny the invisible (verses). That is why you   (Sunnis) are incomplete in faith when you proclaim that you believe in   the total Quran which is the present Quran.
          Even the claim of Quran is that it has everything dry or wet   mentioned in it, whereas in the total Quran in which you (Sunnis)   believe in (i.e the present Quran), you cannot find the mention of the   existence of Pakistan in it, but the total Quran in which we believe in,   it has everything of the past and the future mentioned in it. And that   complete Quran is present under the protection of a guardian in this   world (i.e. Imam Mehdi) which impure people cannot corrupt.
          The situation of your Quran’s protection is such that every   pure or impure person in whatever condition can touch it. There exists   the possibility of mistakes and errors in its manuscript. You cannot   even show the name of the republic of Pakistan in it, whereas our claim   is that the manuscript of the Holy Quran is safe under the guardianship   of our Imam (Mehdi). It has all those things which have happened (in the   past) or will happen (in the future). Hence, our belief is complete and   your belief is faulty because you believe in the partial Word of Allah   and deny the rest of it, whereas we are the believers of both the   partial and total Word of Allah.
          (“Hazaar Tumhari Dus Hamari”, by Allamah Abdul Kareem Mushtaq, p.553-554)
            
            What more can we say? The Shias say that our present Quran is not   complete nor is it enough for the believers. Meanwhile, their Shia Quran   with Imam Mehdi has all things in it, dry and wet, past and future. It   is a much better book than our present day Quran! The Allamah refers to   our present day Quran as a “weak Quran”. And let us not forget to   mention that their Shia Quran cannot be corrupted like our present Quran   can be; notice his reference to the Sahabah: “not even any impure   person can corrupt it”, by which he means to imply that the “impure”   Sahabah cannot tamper it.
            Allamah Abdul Kareem Mushtaq’s assertion that the complete Quran with   Imam Mehdi contains the name of Pakistan would be humorous if it were   not outright blasphemous. Do the Shia scholars think that the Quran is   some sort of encyclopedia or world almanac with an endless list of   pointless facts and figures? Does the Quran of the Shia also contain   information about who won the world cup in soccer, or if the Pakistani   team beat the Indian team in cricket? How many volumes is this Quran?   Surely there is not enough paper in the world to write such a voluminous   book that contains every single pointless fact from the past and   future! How are the Muslims who live in that time (i.e. the Times of   Justice) supposed to read it all? Today, we read the Quran at least once   during Ramadan; imagine how many lifetimes would be needed to read the   Quran of the Shia! It will take a few industrial trucks to ship even one   copy of this book. If this book is currently with the Shia Mehdi, then   surely we could detect where he is simply by satellite image: we would   only need to look for that large book that would be more visible than   the Great Wall of China. What an utter mockery of our noble book! It is   about time for the Shia laypersons to admit how utterly ludicrous the   beliefs of their religion are. That website that they so strongly   support (Answering-Ansar) is inspired by heretics. We can only imagine   Answering-Ansar’s team running around right now trying to do damage   control, and thinking of ways to spin the story. Surely there is now   panic in their camp, and they are utterly exposed for all to see.
            Conclusion
            We urge the open-minded truth-seekers from amongst the Shia awwam   (masses) to reject the heretical belief of Shi’ism, and to instead   embrace true Islam. We are Muslims and we proclaim loudly and clearly   that our Quran is complete and it is sufficient for all guidance.   Nothing is missing from it; what we have in our hands (i.e. the present   Quran) is the guide for all time. O Shia, ponder: how is it that Allah   would deny the complete Quran to humanity for thousands of years? If the   Quran of Imam Mehdi would bring the Truth and vanquish falsehood, then   why did Allah deny it to the people for thousands of years, when He   Himself promised to give the Quran as a guide to the people? What   function is a holy book that is incomplete, and what use is a book that   is not accessible to us? The Shias say that the complete Quran is not   present, and the one that is present is not complete!
            Allah says in the Quran that the Book was sent as a guide for   humanity and through it we will be guided, and yet the Shia scholars   claim that it is incomplete and only their complete version will bring   the Truth and destroy falsehood. Allamah Abdul Kareem Mushtaq repeatedly   says that their Quran with Imam Mehdi “would appear (in the Times of   Justice) and will defeat falsehood”. But we Muslims say that thisQuran–the one we have in our hands–was already sent down to do that! Allah says about the Quran:
            “The truth has come, and falsehood has vanished!”
              (Quran, 17:81)
            
            Yet, Allamah Abdul Kareem Mushtaq claims: “When Imam (Mehdi) will   reveal this Quran to the world, falsehood will vanish from this world   and Truth will rule.” But our Quran–the present day Quran of the   Muslims–says quite clearly that the truth has already come! Why   did not Allah say clearly in the Quran that “the truth will come with   Imam Mehdi”? Instead, Allah said that the truth has come.   Indeed, we true Muslims believe that the entire Truth was brought by   Prophet Muhammad, whereas the Shias accuse the Prophet of being a   failure, and they place their Imam Mehdi over and above the Prophet, by   claiming that the Imam Mehdi will succeed in delivering the complete   message whereas the Prophet only succeeded in delivering the partial   Message.
            Did not Allah say in the Quran:
            “O Apostle! Deliver what has been sent down to you from your Lord;   and if you don’t do it, you have not delivered His message (at all)!”
              (Quran 5:67)
            
            The Quran repeatedly says that the duty of the Messenger was to   deliver the Message, so how is it then that the Shia accuse him of   failing in this task and they say that Imam Mehdi will succeed in it?
            Lastly, we would like to reflect on the Words of Allah, in which He says:
            “The Word of your Lord is complete, in truth and justice.”
              (Quran, 6:115)
            
            Allah did not say that the Word of your Lord is partial or   incomplete, or that the rest would come later. Rather, Allah said that   the Word of your Lord is complete. He did not say will be completed, but rather stated emphatically that it had been completed and perfected. Allah says:
            “Today I have perfected your religion and completed My favor upon you.”
              (Quran 5:3)
            
            The Book of Allah was perfected back then, and to claim otherwise is   to condemn the Quran, the holy book of the Muslims, and the center of   our religion. The reason that the Shia scholars need to make such claims   about the incompleteness of the Quran is simply because their Shia   doctrines cannot be found in the Quran. In the words of one brother who   converted to true Islam from Shi’ism: “I could not find Shi’ism in the   Quran!” This absence of Shi’ism from the Quran is what propelled the   classical scholars of the Shia to claim that the Quran was incomplete,   and this belief persists to this day, shielded from public view by the   curtain of Taqiyyah.
            Article By: Ibn al-Hashimi, www.ahlelbayt.com