There is much debate though as to whether the person who existed actually prophesied the Quran, as many believe, or just added his name to the good bits.
People far cleverer than I have said there is linguistic evidence that the Quran is just a redaction of a pre-Islamic Syriac holy text.
Bit like the Bible, another universally adaptable book that is taken by extremists as being "fact".
Religion eh..... worse than politics.
BURN THE HERETIC.