A nation of immigrants

When people say that the United States is a โ€œnation of immigrantsโ€ to support open borders and other shameful policies, that is a true statement.

What is also true that this โ€œnation of immigrantsโ€ eradicated somewhere between 2 million and 40 million people who were here well before any of us.

So I am not sure what sort of great lesson I am supposed to take from this โ€œnation of immigrantsโ€ crap?