All over the world people move around, when Ukraine fell to the Russian invasion, bordering countries took in millions, but America did not. Sure some finally made it to American borders, but you have a problem with that. Most people who move around Cental and South America stay, once again the number is in the millions.
Once again you now want to always concern ourselves with thousands.
In the big picture 96.5 % of the worlds population stay in their own countries, but 3 1?2 % does move around for all kinds of reasons. That is almost 272 million people, and once again you think America is being overwhelmed.