You have pretty much all of your facts wrong.
In Australia, gun deaths dropped, and overall violent crime also dropped. You're cherry-picking a brief increase right after guns were regulated, which was then followed by a sustained decline in both gun deaths and violent crime in Australia.
It's absurd to pretend that "the only thing standing between a crazy gunman and an elementary school is a piece of paper" - laws are enforced. If nobody (other than the police) at a school can have a gun, then anyone with a gun is obviously breaking the law and can be stopped. If people with guns can roam the school, the only way to tell that one of them is a killer is that they've just shot someone.
The shooting in the movie theatre illustrated how ineffective people with guns (there were several in the audience) actually are in stopping gunmen, which is to say that they didn't do so. The reality is that a gunman can position themselves, and have body armor, and then then shoot everyone in sight. And that generally speaking civilians without training for combat situations cause a lot more harm than help, because they tend to panic and shoot the wrong people, or fire and miss, etc. There's a reason that policemen and soldiers train constantly, and it's because it's the critical difference that makes them effective.
Also, most gun deaths are suicides. More guns strongly correlates to more successful suicides. Limiting access to guns reduces suicides.
Similarly, letting soldiers on bases carry loaded guns leads to more people getting shot, not fewer. That's why soldiers are only issued ammunition when they need it. I'm pretty sure that the Army isn't anti-gun, but they do like to keep our soldiers alive.
I agree that you're not a lawyer, and deliberately misleading.