Problem is, data isn't on your side. More guns = more gun violence. Ergo, making guns at least more difficult to acquire under certain circumstances means making gun violence less likely. The whole "only criminals will have guns then" is the stupidest damned counterpoint if someone with bad intentions (or not) may have to work harder and/or longer to get that deadly weapon. States that have passed open carry laws have thereafter experienced higher rates of gun incidents.
Here's the thing. You really want to get at the underlying, underlying issue? Men. Yep, MEN specifically, are violent fucking animals. Why in the blue hell would I or anyone presume that a guy carrying a gun is a "good" guy with a gun? That guy who is actively armed is one pissed-off moment or stupid impulse or mental breakdown away from not being a good guy. I don't feel at all safe around dudes with guns. And it's usually the gun obsessors who are the weirdos to watch out for. It's such a fetish. Goddamn Americans are weird.