Are my parents stupid for making me do this?

Im 16, 6'2'' and 170 pounds and last thursday I went to the gym to play pick up basketball and I got in a fist fight with this cocky asian kid. I got my entire gym membership at golds gym suspended (worth 1000+ dollars) and my parents are furious with me. Honestly this kid was a prick and kept pushing me when he was smaller than me. And then I lost it because I drove to the basket and he clothes lined me so I pinned him down and punched him twice in the face. Now my parents want me to write an apology to the kid and I'm grounded. like wtf??