Not only that - most of their parents were doctors or engineers or other professionals themselves.
As I mentioned previously, immigration strongly selects for certain types of people. If you need to be able to afford a plane ticket to come to the US in the first place, the only people who are going to come are people who have means.
Think about it - a plane ticket to the US from most African countries costs roughly as much as the GDP per capita of many of the places. The bulk of the people immigrating here are bourgeois, not the bootstraps type.
Alot of this **** is racist.
Florida's republican governor just blamed a COVID outbreak on "hispanic workers" even though the whole state is open and everyone is walking around not giving a f*ck.
Democrats absolutely are not immune to racism and in fact there are many racists on the Left. But in the last 40 years the right has taken the cake when it comes to passing legislation and supporting policy that negatively affects people of colour disproportionately relative to whites.
The funniest part of the whole thing is that, overall, minorities are generally more religious and more socially conservative that White Americans. The biggest reason why we don't support right wing politics is because we think the American right as a whole is intolerably racist.