Am I overreacting to a situation that happened today?

There was an incident this morning at my daughter's dancing school. It actually had to do with me and her teacher. She was with a student this morning before cl and the student was crying. I was trying to comfort her because I am friendly with her mom and I thought that I could help the teacher out in trying to calm this girl down. The teacher screamed at me like a raving lunatic in front of everyone in the waiting room. I was so stunned, embarred, and humiliated. I felt like a child. That isn't how an adult talks to another adult. With that, I left with my daughter. They are preparing for a show in a few weeks. When my daughter saw that I was visibly upset she wanted to leave. My daughter actually doesn't want to do the show because of five hour rehearsals on Saturdays and Sundays. I talked to the teacher on the phone at home and she was horrible. She brought up to me how rude my daughter always is and blamed it on my parenting. My daughter has Oppositional Defiance Disorder. It has nothing to do with my parenting. But it's okay for her to be rude to me. I told her teacher that you always see rudeness in others, but you don't see it in yourself. I left a note for the teacher at the dance studio and it was a nice letter. I was just defending my daughter and myself because of how the teacher treated us. The teacher called and asked if Heather would come back to the next cl. I thought that was nervy. She didn't even apologize. She just wanted to act like everything was fine. I think she did it to let herself off the hook. I feel that if my daughter goes back then she wins. She needs to learn that you can't treat people that way.