Did we all forget what happened in Buffalo with the good man with a gun? The supermarket guard tried shooting with his pistol at the 18 yr boy, bullet was repelled by the heavy body armor the shooter wore, and of course the guard was shot instantly to death by the murder's overpowering AR-15.
These monsters gear up as full fledge commandos and people naively believe that a teacher with a handgun in her pocketbook would make all the difference.