I would not tolerate this at all. I would just go to a local Rav and ask what to do. A school that is running like this is a sakana to its students and should really be shut down. Any hanhala member that would say something like this should not be in chinuch. I am thankful my kids go to a school where this would not be tolerated. I question the talmidim’s lineage. Jews don’t beat up other jews!
