Crime rates from immigrant populations are highly dependent on where the immigrants come from, and the US tends to do a better job at integration than European countries in recent years. Not that the US did not experience problems with immigrant crime from South America, but it is much worse in Europe, notably with immigrants from the Middle East. I think the baseline crime rate in the US was also higher than it was in European countries, before mass immigration policies kicked in.

The US is an ocean way from Middle East. What did you expect? If the US imported inmigrants from war zones, (like Mexico with narcos but far worse), California, New Mexico, Arizona, Texas... would be shitting bricks today.

I'm pretty sure that the biggest numbers of immigrants in those states come exactly from that "war zone" that you think Mexico is.

It's illegal to do such studies in France and to talk about them