<human>: Hi guy's so I am kind of conflicted on whether or not I did the right thing. 

we go to school together in Florida this morning myself and my step brother arrived at school, and we have this guy at our school who is a notorious ass hole. He will make comments towards you for no reason especially guys he deems uncool. 

My step brother has done Muy Thai since he was 7 years old and is a black belt, he is working towards a second degree or what ever you call it . 

Anyway this guy saw my brother and yelled " fuck boy". My step brother stopped walking dropped his bag and started walking towards him rolling up his sleeves.

I grabbed his arm to stop him saying it is not worth it, your just going to get in trouble. He pulled away from me and two of my guy friends came over to help hold him back. 

I have never seen him like that, it was like this state where all he wanted to do is kick this guy's ass. 

I am kinda conflicted though, did I do the right thing. This guy gives almost everyone the a rough time, he is pig headed. My step brother has not talked to me or my friends all day, he seems legitimately pissed and I am scared that stopping him has put a strain on us. 

Did I do the right thing? because I am really doubting myself.

Could you distill the essence of the text into 1-3 sentences?
<bot>: stopped my step brother who is almost a black belt in muy thai from beating up a bully, did I do the right thing