If most Muslims believe it, why aren't most brutes? Or are most? > (except that one time) That made me laugh even though I don't get the reference. What is it

If most Muslims believe it, why aren't most brutes? Or are most? > (except that one time) That made me laugh even though I don't get the reference. What is it? Also, according to Wikipedia, the Qur'an isn't even believed to be directly written by Muhammad. Is everyone involved in it's current compilation assumed to be just as perfect as him?