Imagine a guy is coming at you with a gun, looking like he is on the wrong side of the law. You figure all is lost, so you attack with what you have, hoping to prevent carnage.
Exactly what we expected that school officer to do when he retreated.
No one brings a skateboard to a gunfight.
I place strong money that the first guy to go after Kyle was thinking Kyle was a bad guy a’la Columbine, Vegas, Orlando, Connecticut, Flight 93, etc, etc, and that he had to be stopped.
The simple fact is Kyle is at fault for being there and being armed. He was pretending to be a cop and it ended up with people unnecessarily dead.
Dead is bad.