He is an atheist...and he does mock Islam in his writing....it could or could not anger muslims(based on the personal sensibility of the said muslim...whether he can take a joke or criticism or not)....but the majority of the angry muslims never read the book...never even read a summary....Mullahs said..Book Bad Must Kill....the sheeple reacted...got angry and protested against a guy that is not in their country for a book that was not even published in their country....things got heated...protests got intense and the whole world saw the idiocy of the general muslim population.