A man can have a gun in almost every country in the world but he has to pass a few psych, safety and shooting range tests, nothing serious for a gun enthusiast, they should even enjoy learning about guns. Most European countries have many gun owners but they don't give guns to everyone and only militia members can have military grade guns at home the rest are restricted to sports and hunting grade firearms.
So next to Uganda, Sudan, Somalia and other hotspots the USA is only country where a mentally deranged fucker can walk into a store and buy an assault rifle no questions asked, and if you guys really dont see a problem with that, i dont know what to say.
And if youre worried if shit really hits the fan the citizens will be un armed, trust me, as a guy who lived through the civil war in yugoslavia, we had 0 weapons when Serbs attacked us, literally threw shovels at tanks, but in matter of days streets were flooded with guns, my neighbour had a bazooka. Simple law of supply and demand. But untrained citizens with guns couldnt do much vs an organized army anyway, we needed trained soldiers. So if you are really worried about your government sending police to kill civilians for whatever reasons, you should add mandatory military training for every citizen to that sacred 2nd amandment for it to be realistically functional, cause giving a gun to grandpa Ishmael and homeboy Jamal aint gonna do much vs an army of organized professionals.