I see you have reworded your comment a bit, but I still don't see you pointing out valid reasons to not draw the comparison. The first graph is GDP while crime rate is a function of population, so irrelevant. The second one compares small European countries to the largest US cities. You could do that with the largest European cities and small European countries, with the largest European cities and the smallest US states and you could do this with the largest US cities and the smallest US states. So again, in my humble opinion - irrelevant.

The population sample size of Western Europe is actually larger than the US, so the comparison should be valid. Additionally, the sample sizes don't actually need to be equal, they just both need to be representative for us to be able to compare them.

In my opinion, the data remains absolutely relevant.

Talking about the democrat/republican differentiation, I think you are still being more emotional than logical. Let's look at the 20 worst states in terms of violent crime.

It's not like there aren't any blue states in there, right?