I'm torn when it comes to fascists in this regard, because I think it's very important to remember that these are humans that are capable of doing such awful things. Plus the lessons we've learned from WW2 about how easy it can be for a population of otherwise upstanding citizens to allow that shit to go on under their noses
Nazis ARE people too, and that's one of the things we need to remember.
It's also dehumanization that allows genocidal regimes to gain enough popular support to do this awful shit. Look at some of the rhetoric about Palestinians from IDF soldiers, and it becomes clear why they have no problem murdering children. They literally do not see them as human.