There are only two people in the world that I truly and absolutely hate. I hate them for their ignorance, intolerance, pettiness, spite and arrogance. They can't understand the notion of an idea that they have being wrong. They don't even admit their mistakes, let alone apologize for them. They think everything that they don't like is strange and dangerous and they will actively go out of their way to ruin someone else's day for no other reason than to be spiteful.
I've managed to lessen my unnecessary intolerance for anything I don't like over the years, but if either of those people fell down the stairs and broke their neck I think I'd die of laughter before I managed to call an ambulance.