The USA has a lot more violent dangerous people in it than the UK Canada etc, very different populations
Why do you think we are more violent? Maybe, because almost anybody can walk into a gun retailer and buy a gun.
Owning a gun does not make someone more violent. That is a terrible argument. Let's puzzle this out logically. So the more guns one owns, the more violent they become, and the more likely they will use their weapon in a violent crime. It's a silly way to think of it. By that measure, destriero would be the next psycho-killer mass shooter. Rethink your thoughts.
Fully automatic weapons are illegal and have been for a long long time unless a ridiculously hard to obtain permit is granted. Some idiot on another thread described assault weapons as fully automatic, then railed on about AR-15's muzzle velocity. AR-15's are not assault rifles nor assault weapons etc etc etc no way no how no matter what the muzzle velocity or energy expended.
Here's what the answer is------enforce current gun laws and roll back a few as well. We don't need more gun laws. Guns are over-regulated as it is. ---Punish the lawbreakers, not the rest of us.