Your argument assumes certain things in order to work.
If the person is
a) illogical/insane or has some kind of mental defect
b) has no value in his life and isn’t expecting to live at the end of his doing
Your argument doesn’t work. These people go on suicide missions and don’t expect to come out of them, you can’t tell them “hey if you fuck with me, I’ll shoot you”, when they don’t value their own life.
Isn’t part of the whole “leave guns alone they aren’t an issue” argument is that anything can be used as a weapon to kill the man such as knives or even a pen?
Give the teachers ninja stars for all I care, the point is a teacher is NOT the same as an armed guard. And if an armed guard spend 99% of his time with a blackboard and 30 kids in front of him learning, he wouldn’t be much of an armed guard as his attention would be dedicated to something else entirely.
Not to mention military spends a lot of money and a lot of training to make soldiers ready and willing to kill. Just cause you give teachers weapons it doesn’t make them shooting back heros.
This argument is stupid.
I’ll say the same thing I said many times before.
Whether you’re pro gun or anti gun you can’t come up with a solution to stop this that actually works. Whether it be arming everybody to the teeth, or stripping everybody away.
Blame the mother who raised the maniac and didn’t secure her weapons allowing herself to be killed by her own gun.