There are already deep divisions in the US. Multi-ethnic societies rarely survive in the long run. You can’t avoid the fact that minorities overwhelmingly vote for Democrats.
Minorities don’t vote Republican because the media tells them Republicans are racist and no Republican until Trump made a serious outreach. Trump did and he was rewarded with the largest minority vote ever to a Republican.
“Multi-ethnic societies rarely survive in the long run.”
Can you give me an example? Roman civilization lasted about 1,000 years.
The Roman Catholic Church has functioned for more than 2,000.