The US is an extreme outlier in accepting migrants. The current situation is effectively what the vast majority of countries already do. Some go beyond that, and gun down people with machine guns at their border.

The idea that the US is not a country that belongs to its citizens, but some sort of abstract global entity that everyone in the world is entitled to is farcical, and it's coming to an end. The US owes absolutely nothing to non-US people.

If people don't like it that can go anywhere else (keeping in mind that other Western countries are starting to do the same) or, you know, stay in their own country? (Crazy, I know)