Comment by FiniteField

US immigration policy was explicitly racist from its founding up until the Hart Cellar act of 1965. Assuming that the 2016 election of Donald Trump is your benchmark for when immigration policy became determined by racists again, then the US's immigration policy was non-racist for 51 of the last 251 (and counting) years, or 20% of its history.

Safe to say that the 1990s "End of History" theory has been proven wrong. It may be that the ~1960s-2010s "post-national" political consensus was actually just a historical aberration that is still in the process of being unwound.