I don't think humans are inherently anything, in the "good" or "bad" realm. Those words just express how we feel about them, how we react to them. That's not the same as how they "are".

Feelings are natural. I think when our feelings are suppressed, censored, that is when we cannot assess clearly how people "are" in reality. Calling people "evil" just means we are in conflict about how we feel towards them -- we cannot clearly recognize how we do feel. They upset us, but we don't know how to handle that. So we call them "bad".