The great irony of the American bigot arguing against "chain migration" is that their immediate forefathers not only allowed it as a compromise, but embraced it with open arms.
In the fifties and sixties, those in America who deeply concern themselves with average skin tone saw a darkening country. They believed that fast-tracking immigration for family members would allow Europeans escaping the aftermath of World War II to immigrate rapidly to America, which would bolster the numbers and tilt the national average a bit, if you will, caucasian.
... what they fundamentally failed to grasp is that after the war, America sent her fighting boys (and girls) out to enforce Democracy over Communism at the point of a sword. Sen them to countries where the average citizen was not, generally, bothered by intense direct sunlight. And those boys fell in love. With people who distinctly lacked a certain, shall we say, Innsmouth look that our bigot friends preferred in their fellow citizens. Plus, folks from geographically-adjacent countries who went through the arduous process of naturalization were able to bring their extended families in as well.
The final consequence was a policy that had been supported on one side for mostly economic and "melting pot" reasons that was also supported by bigots for decidedly bigot reasons... Turned out to make the country more diverse, not the less-diverse the bigots had hoped for.
It's a feel-good self-own story.