I do not understand about hate, revenge, vengeance, Avenging, getting even, or anything that goes along those lines. Before you jump to conclusions YES I have been done wrong. Many times. But I can't seem to hold a grudge. I never have a need to get even. In fact, some people that have done me wrong, have come around afterwards and as for a favor. Sure, glad to help. And I don't even bring up how they messed me over. They know. I know they know. They know I know they know.
Doing something to someone... the wrong doer... would not change what has been done. And NO I would not feel better for it. I know because I "got even" with someone in high school once. There was no pain involved and no real damage done. Just a little inconvenience for the guy. But it still bothers me to this day, thirty something years later, that I did what I did. That didn't come out right. It isn't a big deal. It doesn't keep me awake at night. Just every now and then the thought crosses my mind and I really wonder "What was I thinking?"
So earthlings..... Teach me about hate.