So you are OK with school shooters using pistols like the Virginia Tech shooter(worst school shooting in history) where I was on campus during the shooting. You only care about AR-15 school shooters.
All I wanted was a gun to protect myself during that shooting and an AR-15 would have been best.
On Facebook the shooter is posing with a Kalashnikov, not an Armalite (I don’t know what was used in the shooting).