People have talked about the US being a melting pot for more than a century. Many, probably most, of the immigrants who came here between about 1890 and 1930 - Russians, Jews, Irish, Sicilians, etc...it took WWII to get us all on the same sheet of music.
Look at how segregated by ethnicity/nationality NYC *still* is to this day, which is where most of those immigrants landed.
Hell's Kitchen - Irish
Flatbush (probably most of Brooklyn except Brighton Beach) - Italian
Brighton Beach - Jewish and Russian. Part of it was named Little Odessa on account of the Russians
Even here in Texas, there are still remnants of Germans and Bohemians. You can go to a couple restaurants in Fredericksburg and hear some of the staff speaking in German-accented English.
We don't have the time to wait for a WWIII to bring us all together. At the very least, a century ago we all had a common religion.
In my opinion, the current immigration to the United States and Western Europe is qualitatively different than a hundred years ago. In addition to a high standard of living (1st factor), the opportunity to live well without working (2nd) also attracts. There are other factors, but, as it seemed to me, what the "old" Americans are proud of (freedom, democracy ...), if taken into account, then not in the first place.
I recently looked at statistics for Finland. New immigrants from the Third World find work in 10% of cases, and after 10 years of residence, only 40% work, the rest still live on benefits. Immigrants from other countries are better, but there are enough freeloaders among them.
By the way, there are not so many Russians in the USA. I don't know why, maybe Russians aren't very enterprising. Basically, these are Russian-speaking Jews, they differ little from Russians culturally, they do not know Yiddish and secular, but there are some differences. Russians do not form communities, and assimilate whenever possible. And there are ethnic groups that never assimilate. They find their niche in society, but they remain a community.
I don't quite understand Western immigration policy, or rather, I don't understand it at all. In Europe, there are constantly signs of purposeful attraction of immigrants from the third world, at least just propaganda billboards preaching tolerance, with appropriate images. They cost money, where do these budgets come from? And the strange thing is, at the same time, it seems that white people are discriminated against. I remember that Poles received visa-free entry to the United States only under Trump. Something similar is happening in Europe - some East Europeens complained to me that for some reason people from Africa receive better than from Eastern Europe. Although the same Poles are clearly closer in culture and more qualified.
