They won't.If most were to read “Bloodlands, Europe Between Hitler and Stalin” by Timothy Snyder your views on gun control may temper.
I live here.
And knew two people killed in some of the news stories that made national coverage in the last few years. It's far too easy for dumb asses in this country to have as an easy option when something pisses them off "let meh go git muh AK/AR/Glock"
Careful with your recommendations on looking at other countries. Because none of the civilized ones have this problem.