This is one of those times where there's an easy thing to do to actually attack the problem.

Physicians have to operate under a code of conduct that forbids unprofessional conduct that's overseen by the Philadelphia medical board or similar. This is something that a parent, or perhaps an anonymous person with knowledge of can report unprofessional conduct. Political indoctrination of minors is not in any way covered under practice of medicine.

I have very little faith that anyone will actually do anything but whatever.