You gloss over the part where even with the best intentions imaginable European immigration would have killed 90 % of American Natives with their new pathogens. No matter which way you slice it that is a scenario where European culture becomes the dominant culture, though it would certainly be nice not to have overt genocide and oppression sprinkled on top.
(Of course that’s not the case right now and the great replacement theory is a fascist invention, if that needs saying)
Also be careful not to infantilise immigrants. There is a marginal but highly visible issue happening for example where Saudi Arabia is funding Wahhabit (i.e. highly orthodox) mosques and imams in Europe that when combined with depressed socioeconomic opportunities fuels religious antagonism/radicalism particularly amongst particularly vulnerable teenage second generation immigrants. Is it an existential threat to European hegemony or something Europe is incapable of absorbing? Certainly not. Doesn’t mean it’s an issue we have to refuse to acknowledge in the name of our own leftist orthodoxy.
Yeah as I expected you’re projecting right wing talking points on what I said and answering those instead of anything I -at the very least- meant.
I just do not think that, in a frictionless vacuum, one can completely dismiss the idea that there can be some, however microscopic and inconsequential downsides to immigration (through no individual fault in the vast majority of the population).
Do consider that at the very least if Europe hypothetically did away with border checks entirely and strived for massive immigration, the ensuing brain drain would wreak havoc on the Global South (even worse than right now, kinda like happened within the EU with the former eastern block). Regardless of the exact mechanism, mass migration has long-lasting sociocultural impacts and to say these are only positive is pure globalist ideology.