Then fix your system. Instead of spending your tax money on overseeing drug cartels, it could be used to confiscate all guns.
Holy fucking shit, just do like me and carry a fucking pocket knife with you, that'll serve your self-defence needs. Of course that's a foreign concept to you when everyone is handed out guns like candy. Even if some robber comes at me and threatens me I can guarantee that he won't ever have anything worse than a knife himself because in Europe guns are too restricted to ever be obtainable for those cunts.
I don't need a gun to defend myself, so that's a you problem. By banning all guns indiscriminately it'll eventually get to the criminals who use those guns to rob people.
I'll be laughing when the equivalent to the Las Vegas shooting from 2017 happens again somewhere else in 'murica then.

Betcha American Conservatives will be blamed for it like they were blamed for the Buffalo bullshit and that will affect me indirectly too because my own views are Conservative, maybe too Liberal for an American, but certainly very Conservative in the EU.
There's violence worldwide, difference is that it's never gun violence whereas in America it often is. If you can somehow fix violence overnight then let me know how because nobody in the upper echelons running the world governments have gotten it figured.