@psyla: If any categorization creates its opposite, that means it’s entirely possible for something/s to be completely black and white. Annoyingly technical, I know, but I couldn’t resist. ;) I’m philosophical, sometimes it’s my downfall… But oh, what a paradox.
To answer the question, though… Generally, I only hate people who hate other people, for no good reason – as you’re already well aware. Or I hate people who have bad intentions, who willingly and purposely harm others. As someone else already pointed out – like Hitler. And I don’t even have to have family killed by him to hate him, he was just that bad.
But for other things, there are so many gray areas that hating people becomes difficult for me. Maybe someone did something that affected you negatively, but at the time they honestly couldn’t see the harm in it. Maybe, somehow, they were actually trying to help in one way or another.
I can hate outcomes much more easily than I can hate people, in certain situations. (But I am good at hating people, as I already said. Like racists, homophobes, sexists, pedophiles, etc.)