the principal had referred to Bible scripture on several occasions and informed her he was 'well within his right' to enact the discipline he chose
Ah yes, I forgot that Jesus came down to earth and said “don’t enjoy yourself women, your only purpose is just to have children under our neofascist theocratic regime”
Devil's advocate: it could just be poor choice of metaphors to say that she's a representative of the school, which can reasonably choose to be associated — or not — with a certain image and perception of professionalism.
I’m getting pretty sick of people saying shitty things because they’re bad at metaphors. People who are bad at metaphors should just not use metaphors.
This person is the authority who is taking her potential scholarships because of dancing. Your take actually makes it worse. She is just a thing to him and not a young girl doing a popular dance that women do. It's probably even worse in his mind because it's a dance popularized by black people from the city.
This would only make sense if it was explicitly explained and forbidden to her beforehand.
And since there’s no way any school who cares about their reputation would do that, no, that’s not reasonable. You can’t hold me to a standard I didn’t agree with.