In some ways migrant successes and not failures are bigger fuel for nativist paranoia. Decline of living standards for locals, malaise, substance abuse, opiod crisis etc. are all policy failures, and nativists are terrified that instead of fixing those issues so they can live well in their own nation, the government is happy to let foreigners with more drive and less baggage move in - after all, deindustrialized Ohio is infinitely better than Haiti currently is.

Of course the racial superiority and bigotry play a huge role (in my view the primary role) and economic precarity is a very poor excuse for the insane racism they’ve subjected these migrants to. They aren’t responsible for the policies.