Earlier quoted context omitted.
California went from around 85% white European to 35% in roughly a generation (from 1960s to today). Statewide, only 20% of California students are white so their numbers will continue to decline for the foreseeable future. The US is a melting pot culture and people accept these changes, but there’s no reason that European cultures need to replicate this in their own countries.
I can understand if Europe doesn't want to replicate this, but then they might have to fix their issue with birth rates.
Sub-Saharan Africa and some Middle Eastern countries are pretty much the only places left with high fertility rates:
https://en.m.wikipedia.org/wiki/List_of_countries_by_total_f...
But we may need to consider more solutions than simply using Africa and the Middle East as a breeding ground to populate the rest of the world?