This is a joke, right? Everybody backed away from him, he was clearly after property damage. How would taking someone’s life over damage to a fucking supermarket till ever, ever, be OK?
Someone untrained in firing a gun is mildly more likely to shoot others/himself than someone with decent training. Many police, of course, don’t get decent training, and some civilians get decent training. Ideal training is of course how to uphold the law while hurting or threatening no one.
The numbers don’t bear that comparison out - but that doesn’t factor in the numbers of rounds fired. You might be correct if it is adjusted on a per-round-fired basis.
My grocery store sells knives. Not good knives, mind you, but they’ll see you through at least one stabbing. The plastic packaging may present a problem, though.