How can I convince my friend who left Islam and started to have no faith?! He begged me to help him come back to Islam. The problem started when he has read about the mistakes in Qur'an in some websites. Please, rescue him and give him a word that makes him know that Islam is the right (Deen).

Praise be to Allah, the Lord of the Worlds; and may His blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions. The enemies of Islam have always tried to make doubts about the authenticity of Qur'an in order to attract weak Muslims and those less knowledgeable. This is as old as the history of Islam. Allah mentions it in the Qur'an in various verses. Allah Says (interpretation of meaning): {… So as for those in whose hearts there is a deviation (from the truth) they follow that which is not entirely clear thereof, seeking Al-Fitnah (polytheism and trials, etc.), and seeking for its hidden meanings, but none knows its hidden meanings save Allâh. And those who are firmly grounded in knowledge say: "We believe in it; the whole of it (clear and unclear Verses) are from our Lord." …}[3: 7]. Allah also Says (interpretation of meaning): {And indeed We know that they (polytheists and pagans) say: "It is only a human being who teaches him (Muhammad SAW)." The tongue of the man they refer to is foreign, while this (the Qur'ân) is a clear Arabic tongue.}[16: 103]. Allah also Says (interpretation of meaning): {Then he said: "This is nothing but magic from that of old; This is nothing but the word of a human being!" I will cast him into Hell-fire.}[74: 24-26]. There are many verses in this respect. So, Muslims should avoid reading anything from these bad people or listening to them. But if they happen to be confronted with any of their misconceptions they should ask the Muslim scholars who will make the matters clearer to them and prevent them from going astray. It is not lawful for them to surrender to Satan's insinuations. We remind the dear brother that the distracters and enemies of Islam have done everything they can during the last centuries to spread misconceptions and rumours about Islam. But only people with weak faith would be influenced by such propaganda. If your brother wants to remove what he has, he should sit with a scholar of Qur'an interpretation and expose what he feels and what's in his mind and by Allah's Will all his worries will be dispelled. Allah Says (interpretation of meaning): {… Had it been from other than Allâh, they would surely have found therein much contradictions.}[4: 82]. He should also keep away from such people. We ask Allah to make us and you steadfast in the truth. For details about repentance read Fatwa: 81467 and 84677.                                                      Allah knows best.