I'll leave it at this
In Australia from 1983 to 1996 there were 13 mass shootings where more than 5 people were killed by guns, since enacting their regulations there have been 0. Does that mean it's perfect? No, there have been other styles of attacks, but in general the country is safer.
Once America decided it was okay that Sandy Hook happened it was over, regulating guns would make the country as a whole safer, I don't think anyone would argue that. Does it remove some of your individual safety to protect yourself? Yep. American culture is me first, most don't give a damn about others outside of their family, that is their values. You can talk about the decline of the traditional family, but that's happening around the entire world and we see far less violence outside of America. It's not about some arcane view of what a family should be, it comes to people not being willing to put others ahead of themselves.
It's not one single thing, there isn't one simple solution. When people feel isolated or uncared for or alienated they are prone to lash out. That doesn't mean we can't or shouldn't try. Lets start with voluntary gun buy backs, let's let the government say it's okay to let private companies buy guns and have a method of destruction that is approved and observed. All the cost goes on those companies and individuals who care, which will be the Dems obviously. Then lets start investing in our communities, lets be willing to give a little to make society better as a whole, and that means on both sides.