Coming to Jesus is one thing. But that's not what we are talking about. We are talking about the church's responsibility to its members, the community, and to the head of the church. This question is not even difficult from a biblical aspect. Those who would ignore how the bible commands this church would instead insert their own ideas.
But you raise an interesting point. Responsibilty. Deos the headmaster not have a responsibility to handle things in such a way to prevent the school from being cast in an extraordinarily negative light ? (like letting the kid finish the Last 3 weeks, and not allowing her back...)
But instead he handled this like he did the Valedictorian inciident...With ZERO common sense.
AFAIC, there really is nothing else to talk about but "Coming to Jesus." Everything else is just the lawyerly pharasaic doctrine that Jesus preached against. Sweet irony that one of the minority on this thread making exactly the same point is a lawyer.