When the U.S White population officially hits below 50%, I think there's going to be a breaking point. But not because of what's going on in the government or Capitalism, but because all their history that ties them to the land is being erased. Whether it's the destruction of George Washington/Abe Lincoln monuments, or school textbooks that constantly teach that White Americans are the villains despite playing a big role in founding the civilization.

The worst aspects of multiculturalism is it intentionally makes natives feel like Aliens in their own country. They either become like Brazil and admit they have no real identity left, or they move somewhere else and forge a new one.

I believe half the white population will remain split on this. The ones who already live in coastal liberal cities and are rich will go the "Brazil" route and live with their multicultural friends. The other half of Whites who don't want to feel like stateless people in a hostile environment will move to another area and claim their identity back.

Funny thing is in Brazil, they had something similar in their own history. The Whitest part (South Brazil) wanted to secede from the rest of the country because of how vastly better they are, but it turned into a drawn out war which ended with the separatist republics being re-absorbed by the Empire.

https://en.wikipedia.org/wiki/Ragamuffin_War