Yes, there are certainly many who are just inherently evil, but I don’t think that’s the majority. I think most of them are like Eichmann: objectively speaking, of course, they are also evil, but they don’t get satisfaction from their cruelty. They simply don’t question what they’re told because it’s their job - and that’s enough of an excuse for them towards others and also towards themselves. Doesn’t make them any less guilty, though, I would say.