AITA for telling my friend to stop tryna imitate a rich person’s laugh?

Not too much about it, my friend who I’ma mention as “O” recently is trying to imitate a rich person’s laugh to boost his own ego and respectfully he doesn’t sound high-class he just sounds high… And recently during call withh some friends over discord we were chatting and stuff, someone mentioned something funny and of course everyone laughs, one of my friends point out that O’s laugh was a bit off, and the group divided into those who want to stroke O’s ego and the other half just put off by the rich laugh attempt. Of course I was one of those in the put off group and tbh maybe I could’ve worded it better but I basically said “Please stop trying to act rich.. Your family is lower middle class like the rest of us. You don’t sound high-class doing that, you lowkey sound higj asf.” Which resulting in me getting blocked by O and those on his side. (Yeah maybe I am actually an AH lol)