Was I being too harsh with this girl or no?

Are we supposed to be mean to students. I mean yes we should be honest but not make them cry. One student was brutally blunt to this 13 year old girl for being a bully sort of, and being rude and nasty to her classmates for no reason. I heard she made one if her classmates cry and calling her a horrible name. The teacher bluntly called her a huge stinker and no wonder her classmates done like her too much. She said some thing else but I won't mention it and it's too brutal. This girl came to me crying so hard. I wanted to give her a hug but I didn't and said, "Well it's your own fault and not only you're hurting your classmates but you're hurting yourself for being a bully. Keep it up and no body will be around." She yelled at me for being mean.