When it comes to the coming collapse of many (currently) majority white countries, I see the USA in a unique situation than many other countries. Not due to the ratio of whites to non-whites or birth rates, but the number of categories of backgrounds of the groups. Most countries have their African, Indian, Middle East, and East Asian populations. But the USA has all of these plus the black population here since slavery and Hispanic population coming in from the south.
Will these additional factors make things worse during a collapse? Maybe. There is going to be conflict and violence when the decline progresses, though I am not sure that having more groups of populations will mean we will be uniquely worse off. Contrary to the existing anti-white sentiments that are present in many groups, most other groups of people do not get along with each other.
But that is just human nature. We are naturally in group focused. Only propaganda keeps whites away from this.
El Salvidor's president Bukele found the answer to this and now many want to go back home because he's made it safe, Godly and prosperous.
Tucker's recent interview with him was great - here's the timestamped part that explains it - https://youtu.be/U5n8R9lq8SI?si=DOPXMqKlA7MhfuJs&t=3603
While I suspect many immigrant groups will go back to their country if origin when circumstances get worse, those that remain will have to choose how to respond to violence. Most I assume will organize along ethnic groups to protect themselves. But it will not be them versus whites across the board, but rather them versus anyone within proximity to them.
We saw this response with Roof Koreans in the LA riots and Muslims in Dearborn during BLM riots. So it is most likely to happen that way again