Either you are trying to pretend this doesn't happen to excuse fathers from failing to defend their sons against this sexism, or your parents really did manage to find a school system that protected all students equally. If the latter, then good for them.
I went to school in a primarily “white” town 35 years ago; even the schools “on the bad side” didn’t have problems with girls hitting boys. I doubt ANY schools did back then; I don’t think young girls just assumed young boys wouldn’t smash them in the face if provoked.
There is no stronger opponent of today’s “war on men” than me, I assure you.