If this school has an anti-bullying policy, then the staff is not enforcing it. Perhaps the parents’ legal advisor wants to give them enough rope to hang themselves.
His parents need make sure he is not in that school next year. No matter what they have to sacrifice to do it. The racists will eat him alive and the school managment will cheer them on. I’ve seen liberal packs of ‘educators’ in action working to harm targeted students. They will try to keep him out of college, too.