You weren't here under the Clinton administration, were you? Most people were better off than they had been in years (certainly moreso than the reagan years), and it showed. Auto-manufacturing was never something to worry about with Mexico in the first place.
As for immigration, most of those who come here are on greencards or college visas before they become citizens, and when they do take jobs it's usually in the form of construction or entrepreneurial work.
You don't have a fucking clue, do you?