By all account he was strange, difficult or weird. As a parent, I might well be concerned.
The answer is to fortify the school.
If the kids mean something to their parents, then the parents should secure them, and I do not mean with door buzzers and cameras, I mean with heavily armed men.
Yes, such security will cost more, so what. The alternative is apparent.
There is no way that I am going to disarm in this society. No way. And I have no intention of further empowering this communist government to control my ability to defend myself or anyone else’s ability to defend themselves from the psychopaths that infest this country and world.
Are you telling me that everyone who is weird or difficult and strange should not have the right to effectively defend themselves from criminals and communists?
If you are scared, then defend yourself. Stop trying to disarm others. You are trading freedom for security, and you will soon have neither as a result of your foolishness.