I am not so surprised.
It's been the case for quite some time that teachers and education authorities have felt that they can step into the parental role in terms of teaching ethics and values and supporting students.
I know many people here are very supportive of schools doing things like helping teens access birth control, abortion if necessary, teaching values around sexuality, having lgb clubs, and so on. But the thing is, this is keeping stuff from parents, probably in most cases things parents would be better off knowing, which arguably they are best placed to support their kids on, at least where there isn't an abusive situation. Certainly if we are talking about the same kinds of safeguarding principles that say outsiders are more likely to be dangerous to kids than their own parents.
A good friend of mine was shocked to discover that his 11 year old daughter was the founding member of her primary school lgbtq+ club. The school was extremely enthusiastic about it. Kids most certainly did not need parental permission to join, no matter what the family's view or background.
From the POV of a lot of the teachers, this is not different in principle, and the schools already see themselves as rightfully teaching kids values and ethics when their parents are backwards.
I think it is no surprise it's escalated. That's what happens when you elevate the role of the state over parents.