This is exactly it. It's as if Hitler was uniquely vile. There is no other person's name so well known, while the person himself so unknown. I think historians are scared that if he was better known, that he might have sympathizers. But this is ridiculous. Even in the biblical narrative, Lucifer was once God's favorite. Yet that doesn't take anything away from him being the Devil.

It's important to know about the atrocities committed. But even more so to understand that he was not the only, and furthermore will not be the only. There are people like him hellbent on similar outcomes. We can't avoid repeating history if we examine them at the superficial level, rather than on an abstract, psychological, human level.