As an aside, it's a lazy, historical cliché, perpetrated often by the media itself, that the period of Nazism represented some kind of "one off", the nadir, the worst evil ever perpetrated by humans.  Horrific as it was, even in the same century more were murdered by Mao, and also by Stalin, than by Hitler.  And ever read what the Comanche did to captives?  If you survived the depredations inflicted on you when captured and made the ride back to the Comanche encampment it's likely the women would delight in slowly roasting and mutilating you to death over a period of days.  Humans all over, throughout history, are sometimes quite happy to be vicious animals - our own capacity for evil, that inconvenient truth, that's what needs to be remembered.