Czechia is a European country you want to look at for an example that you can have gun laws that allow civilians to own handguns and carry them for defensive purposes without problems.
US is somewhat unique in the Western world across the board - no public healthcare, generally poor social safety net etc - which means that exercises in causal linking of those unique traits to outcomes are wild guesswork, if one is taking a charitable perspective. A non-charitable one is that people mostly just cherry-pick things that compare favorably for whatever political cause they're advancing, and will often outright refuse to believe a similar comparison that is contradictory.
US is somewhat unique in the Western world across the board - no public healthcare, generally poor social safety net etc - which means that exercises in causal linking of those unique traits to outcomes are wild guesswork, if one is taking a charitable perspective. A non-charitable one is that people mostly just cherry-pick things that compare favorably for whatever political cause they're advancing, and will often outright refuse to believe a similar comparison that is contradictory.