I’ve only met one person upset because I married a Filipina while stationed there, or because I adopted 2 kids there before returning.
The problem isn’t with immigration by itself, but when it comes illegally from people who have no wish to assimilate. The anger comes when we pull up to a drive thru and are asked for our order in Spanish. The anger comes when many of those coming across the border are NOT good people looking for jobs, but bad people who steal, threaten, or leave their trash in our yards. The anger comes when those entering decide to live 12 to a house so they can work for less, forcing Americans to either stoop to that level of living or find a different line of work. And the anger comes when we bring in large numbers of Somalians, who don’t have jobs, don’t know English, and who feel free to attack American girls in school because in ‘their culture’ a female isn’t permitted to talk back to a male.
I’m in favor of a pause in all immigration from Mexico until we’ve had a chance to assimilate those who are here - and based on studies of language adoption, that may well take 2 generations. I have no heartburn at all with increasing legal immigration from China, the Pacific, Europe or other non-muslim parts of the world.