I didn’t cherry pick the worst part of the U.S., I just picked the state with the highest firearm death rate. There are many individual localities within the U.S. that are far worse.
So let’s apply the same test to see if your theory is true:
The U.S. State with the lowest firearm death rate is Massachusetts with 3.4 firearm deaths per 100,000 annually. That’s still significantly higher than Canada (2.05 firearm deaths per 100,000) and almost 15 times as high as the UK (0.23 firearm deaths per 100,000).
Nope. Any way you run the numbers, the U.S. is a huge outlier on the world stage in terms of gun deaths.