More to the point, herein lies one major concern I have about Islam. In contrast with the general historical awareness, even recognition, of the manner in which the scriptures were generated in Christianity, which made textual criticism possible, there is no such recognition in Islam. (After all, it was a Roman emperor who ordered that an authoritative biblical text be put together. There was no pristine single copy to pay slave to, and the essence of the faith was defined by synods and in creeds.)
In the case of Islam, we have a sacred immovable text, so 'perfect' and unamendable that only the original classical Arabic is considered valid for the practice of true Islam. (Which in turn has produced arguments regarding the perfection of classical Arabic, which gives me nausea as a trained historical linguist.) This, in my mind, this absolutism at the level of the Koran itself, is the key obstacle to the modernization of the faith as practiced, and is what threatens a return to its worst forms at any time.