Those are vetted immigrants. Vetted immigration is positive for the country, unvetted immigration tends to not be. Edit: And the "less likely to commit crimes"

Those are vetted immigrants. Vetted immigration is positive for the country, unvetted immigration tends to not be. Edit: And the "less likely to commit crimes" part is a large part due to USA having such a high crime rate to start with. Last time I looked unvetted immigrants to Sweden and USA had roughly the same crime rate, but in USA that reduced the crime rate and in Sweden it massively increased it. So even if everything else is the same "immigrants increase crime" can be true in one country and false in another just due to the original crime levels being different.