You can immigrate somewhere even if there is no government. I could emigrate to Somalia if I chose to. The nation was founded by immigrants and their descendants. Even the ancestors of American Indians immigrated here at some point. You are splitting hairs that are ultimately meaningless.
No, not quite meaningless. Hold onto your wallet, whenever you hear that old saw, “we’re a nation of immigrants.”
We are not a nation of immigrants, as I’ve repeatedly stated before. We’ve graciously permitted very generous immigration that has on occasion been to the detriment of the nation. It is not a sentiment that is always positive, maudlin sentimentality of recent immigrants and their descendants aside.