To me it feels like the US pretends they don’t need immigrants when:

1. The overwhelming majority of current US residents were immigrants themselves at some point in the last 150 years (only natives were there, everyone else immigrated from somewhere)

2. The US wouldn’t function without illegal immigrants

3. Every country is short of workers in one domain or another. Encouraging immigration in these domains (see how Canada does it for instance) would be the smart move. But instead… yeah let’s make it even harder across the board

EU countries are working on imigration rules that would allow for bringing imigrant labour without ever extending citizen privileges to them. A sort of permanent uderclass. This is what voters want at this time.