Oh, for fuck's sake.
1. Switzerland is the 4th wealthiest country in the world, up there with Qatar and Luxembourg. Your link is "adjusted for purchasing power," which is beside the point.
2. Poverty rate in Switzerland is 7% compared to 15% in the US.
3. Income inequality in Switzerland is low, comparable to the UK/France. The US is medium high, comparable to the Philippines, Jamaica and Iran.
4. Unemployment in Switzerland is 3%. It's more than double that in the USA.
5. Switzerland is 93% German, French and Italian. It's extraordinarily homogenous so there's less ethnic conflict.
6-100. You can't possibly believe that an honest way to look at the preponderance of the data is to say, "oh, _Switzerland_ has lots of guns and low gun crime, and _Mexico_ has few guns and lots of gun crime, therefore guns and crime are in no way correlated!" Those two countries were deliberately chosen by fairly_unbalanced precisely because they're outliers from the general trend, which is more guns == more gun crime, with the USA at the extreme on both axes for wealthy first-world countries.
Why is Mexico an outlier? Oh, right, drug war.
Why is Switzerland an outlier? It's Disneyworld in country form, and as pointed out up-thread their gun ownership is part of a very well-regulated militia, not a bunch of rednecks with assault rifles.