Was I wrong for breaking this guys arm?

Hell no u weren't wrong! I admire you! I got the hell beat out of me soo many times I wished sooo many times someone would have done something but no one ever did, even when I was pregnet and in the middle of the grosery store. ppl just dont care these days. After so long i quit wishing. Dont feel guility he needed to be put in his place. You could have saved her life in the long run. Really... THANK YOU! Even though it wasn't me, it's nice to know that there is ppl like u out there still. And still hope.

Don't. He was being abusive. Hell, I would have done it myself if I saw that crap going on. Obviously, you do run the risk of getting yourself in legal trouble, which isn't worth it.

Probably the best thing you should have done is to get in between them and tell the guy to stop and try to get the girl out of there. Call the cops and get the guy arrested...

However, I don't think you were in the wrong. That bastard deserves it.

NO you were NOT wrong. you sound like a sweet and nice guy, especially since you've never been in a fight in your life. this guy just rubbed you in all the wrong places! lol. he deserved it, definitely. PUNCHING a girl? COME ON.

if u feel so strongly againts what he did its not such a bad thing..... but nothing is really resolved in violence. do u know what she did to provoke him? or even if she did provoke hime. not that thats an excuse. dont feel bad about it just stay out of other ppls buisness in the future and u wont have to feel bad

2 wrongs don't make a right.. so feel bad for what u did.. but definitely do not feel bad for what you stood up for..