Well I'd say a lot of the times people screw me over, sometimes I do fuck up, very badly usually, and I try to make up for it. However, at the same time, I will defend myself.

I guess a good example would be, I have an opinion, as in, I like or believe in something controversial, however, though it's not bad, it is something people don't like (for whatever reason) or disagree with if it's a belief, but they criticize me, so that's when I get defensive and tell these haters off as I'm not in the wrong in this situation.

However, in another situation, I said or did something out of my character, usually very bad, in that situation, I consider it my fault and I'm not in the right.

So that's just my morality, maybe it's right, maybe it's wrong.

I don't know.

I'm just trying to guess here.
Basically in a nutshell: You hurt me first, I will hurt you (emotionally).

If I hurt you first for no reason, I will apologize, unless you deserve it, then I won't.