I don't know about that. in my view, you can call him a murderer, genocidal, sociopath, anything related to his actions. But calling him an epithet, comparing him to an animal is a different thing. Even physical violence is more tolerable. of course people can say whatever they want in private, i'm talking about public discourse. terms like "monkey" and "dog" have been used across cultures to mean really nasty things. It's dehumanizing (literally!), it says as much about the speaker as it does about the subject.