Hate is a word used to describe the strong feeling of disliking someone.
Most people feel the need to hate someone when they're angry.
For example, if your parents sent you to your room and took your phone away you would "hate" them when really you just disliked what they did.
You can't actually hate anybody, what you hate is their actions.
Guy 1: *kills child
Guy 2: I hate you
Guy 1: no you hate what I did :)