Let's be realistic here, the various scenarios:
a) He miraculously fights off the tear gas, calmly aims in a crowd of screaming and scrambling pedestrians and lands the perfect shot in the head, missing the protection of the helmet to take the guy out.
b)He can't see poo, his eyes have gone to hell and he shoots at the first black figure running past him, who happens to be a young boy.
you tell me what's more likely to happen, it's a horrible situation because once initiated there isn't much anyone can do. Prevention is a much more stable form of handling this problem
A- such accuracy wasn't needed. Didn't need to aim in between cracks in his helmet. Bullets would have gone right through it. Was riot gear....not a bullet proof head. A couple hollow points wouldnt of been stopped by a riot helmet.
B - I agree here. Don't want to be part of the problem. However do to the stadium seating and where the killer positioned himself.....he was probably a good target if tear gas wasn't in play.
But the mass killing was another example of one choosing a place where people are helpless to stop them. No risk of armed civilians. There are plenty of places where this guy wouldn't of gotten off all those rounds.....but it was part of his planning.