One can probably see here shades of black.
Hitler was quite influenced by his own propaganda. I won't deny that he was an absolute monster, though Goebbels could be even worse, but in his own wretched mind Hitler, for example, blamed Jews for everything that ever went wrong in his and everyone else's life, believing in the grand world conspiracy. This was naturally unjustified, narrow-minded, and radically discriminatory, which are things to be seen as being evil. However, it was an agenda and no fun pastime. He and all the national socialism could be seen as conspirational madness. The same as we see today when people start believing every lie they are told and are willing to go to the greatest lengths to fight the enemy they made out to be. Propaganda is that powerful.
I'll give you that people like Goebbels just have done it for power, which can very well be seen as pure evil.
What I meant by monsters are those who apparently can kill women and children without remorse. Like Wagner mercenaries who defile bodies and play with cut-off heads. In some way, this savagery without reason is its own class and that's something I mostly see in recent wars in our globalized world with fluid fronts, yet maybe I'm only more aware of it due to the greater amount of media that displays it. However, usually, I try to look behind to see why people would go that far. Many atrocities in historic wars had a cause. Hatred that was long cultivated. People who just kill out of a sense of superiority are probably the minority. Even fewer there are, I hope so at least, those who just kill for the savage fun of it.
I seriously hope nobody sees any kind of support for those things in this comment. There is nothing to support about discrimination, murder, and genocide. But what I was trying to say is that in my own personal opinion, I find evil without reason, without any further thought behind but the evil act itself, to be so absolute that it seems like a distant cliche and is hard to come by.
Yet then I watch the news.
