So one would be hard-pressed to argue that there is a positive correlation between gun control and murder rate (regardless of weapon).
Oh, what nonsense.
The US is by far the highest of the developed nations on that list. The next one after it is Finland, with half the murder rate of the US, and all Western European countries have rates 3 to 5 times lower. Japan has some of the strictest gun laws around (no guns for anyone, essentially), its murder rate is 14 times lower.
Sure, if you want to compare the US to Colombia, Uganda, and Sudan it looks great. It's also utterly ridiculous to say that the difference has anything to do with gun laws.
Personally, I don't think the US's #1 spot has that much to do with gun control, or that banning guns tomorrow would magically transform the US into Germany. But to say there is no correlation is just stupid.