I'm surprised you single out Americans who on the whole still a lot more welcoming than a lot more countries in Europe and Asia. The last few months have torn that reputation apart of course, and there is loud group who would happily shut the borders, but there are a lot of citizens who are happy with legal immigration, sympatric to illegal immigration, and still embrace the melting pot.

My conversations with H-1B visa holders is that whatever aggravations they may have in the US, they can still get into the US. Other countries just don't have that pathway