There are people who believe that because Darwin provided a theoretical basis that humans and animals have a common ancestor it becomes a rationale for treating humans more like animals. Thus we get things like Nazi Germany and the holocaust.
I suppose that’s one way of looking at it.
Another equally valid way of looking at it is that common ancestry becomes a rationale for treating animals more like humans. Thus we get things like People for the Ethical Treatment of Animals.
It’s all a matter of how you choose to look at it. It’s really more a reflection on your own soul which way you choose to see it.
Good people do good things. Evil people do evil things. Knowledge (like Darwinian evolution and the recipe for dynamite) is inanimate and can be employed by good people for good things and evil people for evil things.