There's also the fact that school proliferation itself is a relatively recent (~80-100 years) phenomenon; and after that there was a world war, and after said war maybe not everybody could afford to/ had a priority to buy guns ("greatest proliferation in the Western world" does not necessarily equal "proliferation at the same levels as today"). Last by not least, maybe the other factors you mentioned would still result in less shootings if there weren't guns widely available everywhere?
But time and again we've seen violent crimes rise after enacting gun control, most recently in New Zealand[0] (this particular report focuses on gun crimes, which are on the rise after gun control has been enacted, but it's by no means a problem isolated to gun crime).
It all indicates the problem isn't the gun, it's the person. And taking their gun away doesn't take away their problems. I find it odd that the current climate of acceptance and a desire to help others can so staunchly ignore mental health issues.
> It all indicates the problem isn't the gun, it's the person.
Really? How did the persons become worse because of the gun control laws? Because that's what your message implies, that said rise in violent crimes is related to enacting gun control.
It's quite an extraordinary claim - among others, it implies these are all premeditated crimes (shot other person knowing that it would not have a gun - without that knowledge, crime wouldn't happen)