The other 98% of americans are immigrants or the children/grandchildren/great grandchildren/etc. of immigrants.
Some of my ancestors immigrated from Ireland and Italy to the US, but despite that, I've decided to work in software engineering instead of the mafia.
98% of the population are immigrants or the descendents of immigrants.
The people who wrote the US Constitution were immigrants or the descendents of immigrants.
All the presidents, including the current one, have been the descendents of immigrants.
The US Constitution has survived this reality for 200+ years.
I realize some people, like my aunt (whose grandfather was an italian immigrant), want to pretend there is a difference between immigrants coming to america today and those who came 50, 100, 200, 300 years ago. But the difference is primarily in her mind, and now she treats new immigrants the way her grandfather was treated by people who decided italians should not be welcome in america.
It seems to be a constant tension here that I don't expect to every really go away.
I'm sure in countries without immigration people find other things to use to classify each other into groups that are convenient to dislike and scapegoat.