Does noone see the irony in an OP about a couppe of random incidents, which she knows literally nothing about, and instead of doing something about it, actively asking them, or helping the woman laughed at, extrapolates a question that women are like this???
It really does come across as you being the one making judgemental and sexist commentary about all women bassd on two women in your workplace.
Its most odd.
As for the biazarre interaction that you were subjected to bluntness having any place in this context, and the most odd conclusions drawn by the head teacher, having any relevance and thats its all about jealously is wrong.
Its about the girl that visciously attacked you, unprovoked, having serious issues. Serious.
The headteacher was far from 'insightful' to place such a shit explanation on it. It seems to me.more likely they had no clue how to deal with this incident and just didn't and tried to stop you doing this too.
Some use 'jealously' as a way of stopping people pursuing harms done against them.
I've heard it used in the legal sphere, and elsewhere to make the victim feel somehow special because someone else is else of them, apparently.
Its harmful conjecture and nonsense.
If you seriously wanted to know, OP, you'd have made comment at the time, instead of turning it into idle gossip without basis on this thread.
Extrapolating such from such doesn't add up because you don't know anything about it from those involved.