Then let’s talk about police training and tactics.
We do know for sure, that any individual policeman there, who defies orders and charges in somewhere, is going to be disciplined for defying orders.
Maybe the problem is with the official procedures for handling these situations. I don’t know enough about procedures to comment on that aspect of things. But I do know, that any individual policeman in the squad on the scene, who decides to do a Rambo attack, against orders, is going to get disciplined or fired.
None of the parents had weapons? Come back with guns and go THROUGH the police. If that were my kid, I’m organizing parents and shooting my way IN if I have to.