I doubt that a person for their whole life is completely evil, but at times there in questionable persons lives that they are probably truly evil. It is possible, but rare if it has happened at all. When they thought about an action, knew it was wrong, and did it anyway. They may regret it later, but that does not change the fact that (in that scenario) for that time, they were IMHO truly evil. Well, I defined love as "a feeling that makes you want another person to be happy and the actions to back it up." Maybe evil is the opposite, "a feeling of wanting to make other person/persons unhappy, and the actions to back it up." Hitler? Well, his feelings for improving the world directly relied on the unhappiness (to say the least) of many people, so that in my book is evil. Same can be said of other people on that list above. It was IMHO more like "we must kill the Jews to make it a better world" rather than "to make it a better world, we must kill the Jews." (slight diffrence, but I hope it gets my point accross).