Attack, then after that, calm down and chill. It's a waste to spend your day raging against insensitive idiots.
I have to intervene because the victim sure as hell can’t… and attacking won’t help as violence makes things more complicated… if it weren’t fact that I am still sane and laws are a thing I would’ve killed the bastard.
Attack, as in, doing something. Not necessarily violent attacks. It will also help your friend, and soothe your emotions. Any case, deep breath. Then think of your course of action.