Using the word "immigrant" to blanket all people who have moved here, as if anyone who moves to the US is exactly the same, is a trick. Someone who moves here from Norway is obviously not the same as someone who moves here from Chad. The settlers who built towns and cities from raw wilderness are obviously not the same as someone who gets on a plane and flies to New York to claim free government benefits.

They are different in a million ways, and using "immigrant" to blend them together is a sleight of hand. Anyone with common sense understands that the nation of the USA is/was a place with a specific culture and genetic makeup. Indeed much of Silicon Valley was built and founded during what was a period of very LOW immigration (1950's and 1960's).

To expand even more: importing people from a place makes your country more like the place those people come from. Europe had invented and built incredible things when the USA was founded, almost EVERY immigrant who came to the US until 1965 was from Europe. It's no wonder that the USA became the world's only superpower. Since 1965 we have switched our policy to import people from the entire planet (at much higher numbers than before) and we are pretending that it will have the same result as importing only Europeans.