By all means let’s put armed guards in public schools. I remember in kindergarten really wishing we had cops stalking the hallways: the kind armed and trained to take down determined shooters in bulletproof vests. The problem is that I was raised in Canada, where people aren’t free, so there was no reason for hall monitors to be grownups with assault rifles.
The NRA’s famed slippery slope argument is entirely valid. Nobody seems to have noticed, however, that the slope is tilted in the opposite direction. Give the gun lobby a millimeter, and they’ll slide a mile. If they could dig a hole in the Second Amendment and stuff shoulder-launched missiles into it, they would never give up their cherished right to own them.