Speaking of schools, school shootings could cause way less deaths and be way less common of teachers were aloud to have a concealed weapon because the school police officer is usually the only one in the building with a gun. In fact, there actually was this one school shooting where the shooter was stopped quite early on after one of the staff members got a shotgun from his truck and shot the shooter, but that didn't get much media attention (for some odd reason).
School shootings could also cause way less deaths if there
wasn't a gun in every freaking household.
I mean, unless the gun's accessible, it's useless: and if it's accessible, it wouldn't be too hard for the child to steal it. Given that your alternative solution is to still let some students be shot, and then shoot yet another...
It's a balancing act. Guns being widely available means impulse crimes are possible. If you can pick up a gun and shoot in a matter of seconds, you only need to consider it for that length of time: and everyone loses their temper. If guns weren't so commonly available, such crimes would need to be premeditated and pre-planned. That doesn't prevent them, but it does make them less likely to occur.
In addition, severity of crimes has to measured, not just frequency. I'm in the UK. If someone breaks into my house, I can be reasonably sure the most deadly thing they'll have is a kitchen knife. I can throw a chair at them. If I'm in the US, chances are they can hold a gun on me. Doesn't matter if I have the same, I'd still be likely to get shot.
The same crime, but the outcomes are very different. Even if a burglar gets repelled, preventing the crime, I'd be far more injured in the US than the UK. Ditto for muggings and the like: I'd rather face a mugger with a knife than a gun. Wouldn't you?
Look at the
website you linked, compare the rates of violent crime. Murders occur
18 times as much.
Plus, I'd argue if the sole reason less non-gun crimes occur, is because people are terrified of being shot, that can only end badly.
I'd rather live in a place with a high rate of petty crime, rather than an astronomical rate of getting killed.