The primary function of the Qur’an is to explain all things.
It conveys the message that it exposes all the lies and falsehoods that took place in previous scriptures (the Torah in particular). It is therefore a matter of paramount importance to make an indepth study, not only of the Qur’an, but the Christian and Jewish scriptures as well.
When they find a conflict between them, they are advised to compare the authenticity and integrity of the competing texts that are in contradiction with each other in order to locate the truth.
Some of the corruptions and distortions that occured (according to the Qur’an) have already been addressed in many of my articles including Abraham and the Child of Sacrifice, and Why Muslims Don’t Believe the Jews are God’s Chosen People, and Why the Qur’an Denies the Crucifixion of Jesus.
These articles are written for the sole purpose of educating non-Muslims who have a genuine interest in learning about Islam and for Muslims weak in faith who are deceived by the lies told against Islam by Christian missionaries.
There are only two ways Christians and Jews can respond to the claim of the Qur’an that it is the true Word of God. They either accept it or reject it.
Allah accused the Israelites of rewritting the previous divinely revealed scriptures, particuarly the Torah, with their own hands (2:75, 2:77-79, 2:59), as well as misinterpreting them with their tongues (3:78, 5:13). They once had the same truth that Muslims have but they corrupted it.
The biggest lie of them all is that Allah begot a son. Allah responded to this lie told against Him:
And to warn those who say, “Allah has taken a son”. They have no knowledge of it, nor had their fathers. Grave is the word that comes out of their mouths; they speak not except a lie (18:4-5).
The false belief in Jesus as the son of God constitutes part of a larger falsehood, i.e., belief in the trinity. This verse delivers a warning to those who reject the Qur’an and stubbornly cling to the lie invented against God.
It also directs attention to the inadequate knowledge of God possessed by those who have swallowed the lie. In consequence of this ignorance, they stubbornly cling to it.
The also rewrote the Torah to make it impossible for a believer in the tainted Torah to believe that a Prophet could arise from the seed of Ishmael (a.s) as they falsely excluded him from the covenant that Allah made with the seed of Abraham (a.s.), although he was also Abraham’s son. Arabs are descended from Ishmael (a.s), Muhammad (pbuh) was an Arab, and thus a descendent of Ishmael. They also slandered Ishmael as a “wild ass of a man” (Genesis, 16:12).
The Qur’an condemned that act of injustice and the lie that was told against Him:
But those who wronged changed [those words] to a statement other than that which had been said to them, so We sent down upon those who wronged a punishment [i.e., plague] from the sky because they were defiantly disobeying. (2:59) And who is more unjust than one who invents about Allah a lie or denies His verses? Indeed, the wrongdoers will not succeed. (6:21)
The Qur’an corrected the falsehood about Ishmael and mentions the grant of revelations to the family of Abraham:
… We had already given the family of Abraham the Scripture and Wisdom… (4:54) And Ishmael…We preferred over the worlds…. and We chose them and We guided them to a straight path. That is the guidance of Allah by which He guides whomever He wills of His servants… Those are the ones to whom We gave the Scripture and authority and prophethood. (6:84-89)
Also mention in the Book the story of Ishmael. Indeed, he was true to his promise, and he was a messenger and a prophet. He used to enjoin on his people prayer and charity and he was most acceptable in the sight of his Lord. (19:54-55)
They also rewrote the Torah to make it prohibited for a believer (i.e., an Israelite) to lend on interest to another believer, but it was permissible for them to lend on interest to gentiles (i.e., not Israelites) [Deuteronomy, 23:20-21] when Allah made lending on interest prohibited (4:161, 2:275-281).
Allah responded by sending against them the Babylonian army in 587 BC.
They falsely accused a righteous Prophet, Lot (a.s), of becoming drunk and impregnating his own two daughters one after the other (Genesis 19:30–38). Allah responded by cleansing Lot (a.s) of the evil filth that had been smeared on him:
And to Lot We gave judgement and knowledge, and We saved him from the city that was committing wicked deeds (including homosexuality). Indeed, they were a people of evil, defiantly disobedient. And We admitted him into Our mercy. Indeed, he was of the righteous. (21:74-75).
These are just some of the many corruptions and distortions that occured after the Israelites first rewrote the Torah after the death of Solomon (a.s).