I agree; it isn’t. We can look at countries that have high levels of gun ownership and also have very low rates of violence, and see that there are real differences in culture. For instance, Finland has very high rates of individual gun ownership (probably because they have a very hostile neighbor), but no mass shootings and very low levels of violence. Switzerland has high rites of gun ownership and allows citizens to have machine guns, and has no mass shootings. At the other end of the spectrum, England and Australia both have rates of violence on par with the US (albeit lower murder rates), and very, very low gun ownership.

I think that wealth inequality and lack of social safety networks are probably the biggest single issue, although systemic racism is certainly a part of it as well. I think that lack of access to health care falls under wealth inequality; while, technically, every has access, most can’t afford it. Our criminal “justice” system is also badly flawed; we focus on punishment rather than reform, so we’re getting people back out - in many cases- that are worse when they went in.