While this is true, my point was more to illustrate that weapons aren't just lying around hodgepodge on military bases for anyone to get. At the time of my post there had been media reporting( on CNN I think) that made it kind of sound that way.
If this whack job was a civilian attacking from the outside; he probably doesn’t get this far. This A-hole being an Army Major went a long way towards helping him do what he did, before a proper response could be sent.
Actualy it appears to have been pure dumb luck that the first responder, the civilian Police Sgt who shot him, four times, and was shot once herself, was nearby working traffic for the college graduation taking place about 50 yards from the soldier center. It could have been a lot worse in that unarmed victim zone.
And that is my point, with these sorts, if you have to wait for a response to be sent, you're going to suffer a lot more causualties than you would if the targets could defend themselves. Assuming that the deterance effect of knowing at least some fraction of their targets will be armed doesn't make them think of something better to do that day.