If you prostrate yourself to an all-powerful and unfathomable being five times a day, if you are constantly told that you live in the world of Satan, if those around you are ignorant of and impervious to literature, art, historical debate, and all that nurtures the values of Western civilization, your mind becomes susceptible to fanaticism. Your mind rots.
An ex-muslim friend said it was smelling other men's feet five times a day that finally got to him.