“Nativist” is a term coined by liberal “scholar” types to pillory those who are against illegal aliens walking all over the country. It’s supposed to literally refer to those who oppose all immigration, though—and of course liberals deliberately conflate it with those who want immigration laws upheld. The term is typically only used by liberals and left-wingers.”
Actually you are only very slightly correct. It is a word used mainly by scholars... or fairly to well educated people. It has been in use since the mid 19th century. Not just in the US.
That being said, I completely understand what you are doing here. You are making your own history of this word to slap the OP and make him out to be a “liberal and left-winger”. Why? Because he has a differing opinion than yours and therefore he must be a left wing, liberal. That’s what this site does now. If you disagree, you are suddenly democrat.