Cool, since we are cherry picking data from other countries, let's compare Brazil and Japan, 2 countries that for many years had very similar (and very restrictive) gun laws but very different outcomes. Is it the gun or is it the culture? Japan is a largely homogeneous country, geographically isolated in terms of sharing a border and has an expectation of how to behave instilled in them at a young age. New Zealand and Norway would fit more in the Japanese mold than the Brazilian.
Find me a country that fits in the US mold, a wealthy, multi cultural nation that shares a wide open border with a neighbor who facilitates illegal immigration on a massive scale. Also they need to have an executive branch who has no interest in securing that border and a bureaucracy that is intentionally apathetic. Find me that country and let's make an apples to apples comparison.