>There’s no evidence that immigrants (documented or undocumented) cause any more corruption or crime than native born residents. Indeed, the evidence we have in the USA generally suggests that first and second generation immigrants are less likely to break the law than other residents.
The immigration restrictions are a big confounder here. The US is much more likely to let doctors and engineers immigrate. If these folks then have low crime rate, it could either be because of being an immigrant or because of being a professional. If it's more the latter, that isn't great evidence for letting other kinds of immigrants in.
The US has millions of undocumented immigrants, mainly from Latin America, who work as migrant agricultural laborers, factory workers, restaurant staff, and many other low-skill jobs. From what I remember (it’s been a while since I looked at the numbers and I don’t have a link off-hand), they are involved in crimes at a significantly lower rate than native citizens.
The immigration restrictions are a big confounder here. The US is much more likely to let doctors and engineers immigrate. If these folks then have low crime rate, it could either be because of being an immigrant or because of being a professional. If it's more the latter, that isn't great evidence for letting other kinds of immigrants in.