The serious Muslim claim is not that every sentence in the Bible is false. It is that the original revelations given to Moses and Jesus were not preserved as a single, protected text, and that the present Bible contains truth, human wording, interpretation, and later textual problems together.
The strongest form of the concern
The argument is usually made like this: the Bible is not one book with one continuous, controlled chain of transmission. It is a library of writings copied, translated, edited, canonized, and interpreted over many centuries.
For the Old Testament, there are real differences between the Masoretic Text, the Septuagint, and the Samaritan Pentateuch. For the New Testament, the earliest complete manuscripts are centuries after Jesus, the Gospels are formally anonymous, and there are thousands of manuscript variants. Most are small, but some are significant: the longer ending of Mark, the story of the woman taken in adultery, and the Johannine Comma are famous examples often bracketed or removed in modern critical editions.
There are also historical and theological tensions: differing Gospel chronologies, different emphases about law, salvation, and Jesus' identity, and a canon that was debated before becoming fixed. That is the strongest version of the case: not a cartoon claim that "everything was maliciously forged," but that the text reached us through a human process that does not amount to guaranteed preservation.
What the Quran actually says
The Quran honors the original Torah and Gospel as revelation from Allah, while also saying that some people altered words, concealed meanings, or presented their own writing as divine scripture.
So woe to those who write the Scripture with their own hands, then say, "This is from Allah," in order to exchange it for a small price.
Quran 2:79
They distort words from their proper places and have forgotten a portion of that of which they were reminded.
Quran 5:13
And indeed, there is among them a group who twist their tongues with the Scripture so that you may think it is from the Scripture, but it is not from the Scripture.
Quran 3:78
Notice the precision. The Quran does not say there is no truth left with the People of the Book. It criticizes distortion, concealment, and false attribution. It also presents itself as the final criterion over earlier scripture:
And We have revealed to you the Book in truth, confirming what came before it of the Scripture and as a criterion over it.
Quran 5:48
What this establishes - and what it does not
It establishes that the present Bible cannot be treated, from a Muslim perspective, as the exact preserved Torah and Injil revealed to Moses and Jesus. The manuscript history, authorship questions, canon disputes, and known textual variants make that claim too strong.
It also explains why Muslims do not build doctrine from the Bible when it conflicts with the Quran. If a passage says God rested, or that prophets committed vile sins, or that Jesus is divine in a way that compromises pure monotheism, the Muslim judges it by the Quran, not the other way around.
But this does not establish that the Bible is worthless, that all its readers are dishonest, or that no authentic teachings remain in it. Many passages still teach worship of God, prayer, charity, repentance, and moral seriousness. The Prophet (PBUH) gave a balanced rule:
Do not believe the People of the Book and do not disbelieve them, but say: We believe in Allah and what has been revealed to us and what has been revealed to you.
Sahih al-Bukhari
A fair Muslim position
The Muslim case is measured: previous revelation was real, but its later transmission was not protected in the way the Quran was protected. The Bible contains remnants of revelation, prophetic wisdom, historical memory, and also human additions and distortions.
So the corruption argument is not a cheap dismissal. It is a claim about preservation, authority, and criterion. Muslims respect the prophets and the original messages they brought, while holding that the Quran is the final preserved standard by which earlier claims are weighed.