I am not attacking Muslims as people, I am merely describing the violent false religion that most of them were born into.
Most Muslims probably know very little about the Koran, just following their clerics, imams, etc.
Most followers of any religion follow only parts of the teachings. I'd bet if you took a sample set of any members of any faith, you'd find wildly varrying levels of faith. I've known a few Muslims fairly well, none of them pray five times a day, most of them drink, eat meat on ocassion, and shave.