Okay, but the presence of an attacker implies you are in danger (from the attacker) and thus are justified to assault them until they leave or are no longer willing/capable of assaulting you back.

If you can't safely defend yourself then, why not just become a criminal yourself? You already might become one sooner or later due to circumstance, so just turn to the dark side and start jacking cars! (This is sarcastic, do not turn to the dark side and start jacking cars!)