Just want to point out here that the ethnic majorities of most territories would not like becoming ethnic minorities in those territories. This isn’t some weird phenomenon limited to only Trump voters.
Those who control the culture control the laws, after all. Also the availability (and thus ease of access) of cultural communal goods.
Now some of you reading this are probably thinking this doesn’t apply to you, because you love diversity.
If you are one of those people, I want you to imagine the area you live in going from 5% redneck to 60% redneck over 10 years.
Most stores cater to redneck wants/needs. A statue of confederate general Robert E. Lee has been built in the public square. Serving alcohol has been made illegal on Sundays, and the churches are all redneck churches. Most bars play only country music.
The rednecks have not threatened anybody. But as the dominant local source of money, the businesses shift to accomodate - and businesses of your favored culture(s) close as they fall below the necessary density of customers.
You might believe that this is a necessary sacrifice for freedom of movement and commerce, but that doesn’t mean you’ll enjoy it.