The atheist Jeffery Dahmer himself admitted that his rapes, murders, and cannibalism were a direct result of his atheistic or nihilistic beliefs; essentially he concluded that 'life is meaningless', man is 'no different' than any other animal, and therefore it doesn't matter what you do, such as raping, murdering, torturing, and whatnot.
This is atheism, as a whole is inherently evil, and should be wiped out; sure, a pedophile Priest may rape boys, but he can't justify it with his Christianity, whereas a nihilistic atheist, such as Dahmer, De Sade, and many others most definitely can justify it via their atheism, and even promote it as a good thing.