Nice attempt at a turnaround there. I didn’t click on the link because I didn’t want to go hunting for the stats. I looked them up myself. Sources other than Wikipedia had us lower on the list, but I can accept the wiki numbers too.
There are fairly significant differences there. First, there are about 120.5 guns per 100 people in the US versus 27.5 per 100 people in Switzerland. That’s a significant difference. Additionally, gun crime is lower there. There are 12 deaths per 100,000 here versus 7 there.
One of the big reasons for this may be cultural. There is mandatory military service for males there. I know from my personal experience, while the culture of the military is fairly pro gun, there is also much more respect for firearms and authority.
Additionally, half the firearms owned in Switzerland are former service firearms bought at the end of mandatory service, which is an option there that many people take.
The culture there is also different, as there are national shooting competitions for teens, and the people who do own weapons generally view it as a patriotic duty to protect Switzerland and not just themselves. There are less than 50 attempted homicides there per year.
I’m willing to bet that mandatory service combined with the much lower number of guns is a huge part of the difference there.
As for Nigeria, I’m not sure that argument says what you think. The fact that they have tons of guns and a lot of illegal guns and a high fatality rate by police is kind of the point.