Doodledog
I agree, Musicgirl. None of this is compatible with the feminism that many of us believe in.
Glorianny, you are using DARVO tactics to discredit the girls.
Deny that the teacher is wrong (or weaken the idea by saying she 'doesn't handle it well', meaning that she didn't instigate the issue).
Attack the girls with accusations of bullying, and suggesting that because as a child you used particular tactics against the weak, they must be doing the same.
Reverse Victim and Offender by saying that the girls must be guilty of 'something nasty' and the teacher is vulnerable and has been exploited by the girls.
It doesn't wash.
We don't know anything of the background or anything at all other than what is in the recording. Everything else is speculation.
Doodledog I see you ignore the fact that someone, and we have no idea who, has been asked to write a statement. This doesn't happen in schools unless a major incident has happened.
Let's put it like this. Suppose it was your child who had been told by these girls they were "crazy" suppose your child had been told they were not normal, would you be happy with that?
Whatever the issue (and the trans issue is actually largely irrelevant in this discussion) no teacher can allow one or more children to upset another child and just ignore it.
As I said (and I noticed you ignored this) the girls are entitled to believe what they like. They are not entitled to use those beliefs to upset or criticise another child.