I seem to be the only one here who has actually read Kevin MacDonald's thoughts on the matter (surprise, a Jew did more research than WNs), so let me answer:
The Jewish situation (from 135-1948AD) should show you what happens when an ethnic group loses its own country. White people are deeply hated around the world (some for good reasons like apartheid, other for bad reasons like jealousy), and will increasingly be under siege as their numbers decrease in a "post-racist" world (ironic, I know). In a world where anti-White racism isn't considered racism, you can expect a barrage of discrimination covered up as "tolerance" in the next generation. I can GUARANTEE this will accelerate the more Whites are dispossessed until Whites are the new Jews, blamed for everything even when they do nothing. Which is one reason I fight hard for White nationalism for Whites even though some WNs hate me (as a Jew, taught to fight for the most oppressed, and I'm honoring the people who let my family into America).