We believe with certainty that an ethical life can be lived without religion. And we know for a fact that the corollary holds true—that religion has caused innumerable people not just to conduct themselves no better than others, but to award themselves permission to behave in ways that would make a brothel-keeper or an ethnic cleanser raise an eyebrow.
Christopher Hitchens. God Is Not Great: How Religion Poisons Everything (Kindle Locations 147-150). Random House, Inc..