One of the great contributions of Judeo-Christian moral teachings as well as those of Hinduism, Buddhism, Taoism, and others is that they made clear to us that men are not and need not be slaves to an animal nature. They teach that humans can exercise self-control, and can be civilized and live by the rules of a society.
Sadly, not all humans are civilized. What is worse, some make a fetish and a societal rule of following a practice of being uncivilized, and deliberately behaving like animals, and like uncivilized people no better than those in the backward pagan tribes of one of the sixth century's least civilized regions.
But there is a difference: Those sixth century people didn't know any better. These people do. Or should.