[gottorf]

> Plenty of studies have made very clear that immigrants contribute more to the community and the nation, and have lower rates of crime, than people born in the country.

You should distinguish between the American model of immigration, which has long been the beneficiary of positive selection effects until recently, against the European model (which seems to be more relevant to the GP), which unfortunately seems to have been designed for the exact opposite.

It's trivially easy to find research from Europe that consistently shows immigrants and descendants of immigrants as having higher rates of criminality than the native population. Even a pro-refugee source has to admit that immigrants in Denmark commit crimes at a level 2-3x higher[0].

And taking a step back, your statement on immigrants contributing more than the native population is absurd on its face. Why are immigrants immigrating to begin with? To seek a better life. Who made a better life possible on the other side of the fence? The native population. The degree to which immigrants, especially to the US, outperform the native population, you're just looking at the aforementioned selection effects; you're comparing the cream of the crop of one group to the median of another.

[0]: https://refugeeswelcome.dk/en/information/focus/crime-among-...