I remember a similar incident in our school 50 years ago. Some students believe it is their purpose in life to drive teachers over the edge.
Male teacher, male student. The teacher was asked to resign or get fired.
While I am in favor of arming SOME teachers I worry about such things as this.
I also saw an elderly woman teacher take on a large male student for him being a jerk in class.
You are right about the firearms. I think it is better to have a few guards with the guns. These jackass students could too easily get their hands on them.
Of course, it is also better to have some serious German Shepherds patrolling. Certain groups that gather in cities have a natural fear anyway of them.
My mother is a short woman, and retired about 10 years ago. She worked mostly with “emotionally disturbed” youths. She was not afraid to use her muscle and they knew it. She tried to follow official rules (”hugging” or sitting on the perp) but she made it clear she would do what she damn well had to to keep control.