The Islamic "holy" books were not only written by people who not only did not know Mohamed, but written them hundreds of years after he died. Islam was originally only taught orally and only became written when extreme in fighting began to happen. The books were written by two men who only wrote down what they personally agreed with and destroyed nearly everything they did not agree with. Islam does not teach the doctrine of the Trinity, so there was no Holy Spirit writing through them. This means the Islamic Texts were written by two mass murdering totalitarian assholes who only wrote down what they personally wanted.