Earlier quoted context omitted.
I'm guessing you haven't actually been to Boise? It has a huge immigrant population. Lots of Latinos, but also folks from all over Asia and Europe to work at Micron. It also has an ever-growing number of Californian expats.
Boise ranks #4 on "Percentage of population that's white" https://en.wikipedia.org/wiki/List_of_United_States_cities_b...
https://www.migrationpolicy.org/programs/data-hub/charts/us-...