Do you mean with the Palis or the Africans?
South Africa - Africans
Israel - Palis.
It happened in Bosnia too, in a way. Heck, one could argue it’s happening in the US in a way.
Something like this:
1. Civilization moves to a backwards and impoverished area surrounded by similar impoverished area.
2. Civilization brings prosperity.
3. Prosperity brings workers from the surrounding impoverished areas.
4. These workers outnumber the folks that are ancestors of those who civilized the area.
5. They create laws to ensure they remain more powerful than the indigenous people to ensure the survival of their civilized oasis.
6. The creation of Political Correctness makes this impossible.
7. They lose power to the indigenous people.
8. Barbarism ensues.
9. The area becomes a shadow of the civilization it once was and eventually returns to its former condition, but with more garbage.