[coldtea]

There's also a matter of whether a nation prioritizes its own people over foreigners that e.g. want to be immigrants.

If it doesn't (at least to some degree) then it doesn't make much sense for it to exist as a sovereign nation (in the trivial case, everybody could come in that wants it at anytime).

If it does, some discrimination and sending back of illegal immigrants is inevitable.

The situation is a little trickier for the US though, because itself is a hodgepodge nation made up of immigrants (were most conventional nations have a larger degree of homogeneity). So it can't in good faith say "no immigrants" (at best it can say, "no more immigrants, there's enough of us already here").

(Of course those immigrants first got to exterminate the natives and get their land, so the origins of the US is not exactly a success story for peaceful immigration...)