The right response should be for all right thinking parents to demand, not request, the immediate dismissal of the administration. They should remove their children and organize a tax revolt until their demands are met. Until there are consequences to this type of behavior there will be no relief.
The parents won’t do anything that impacts the school. My husband went through something similar when he was still teaching, though it never came to such a distinct point.
Parents were upset with admin. Told us they supported him, wrote letters to the editor in his support, some even gave small gifts of money to us but all of them kept kids there.