Good take.
The thing is since my youth times media propagated the idea (trough movies, series, literature and such) that migrants that go to the US are after the American Dream, they want and are proud to become American. Nowadays probably not so much as we see from the antagonising pro Hamas rallies and such in US campuses.
But I don't think we've had or, at least, haven't had for many decades proud immigrants of becoming EU citizens. Maybe the UK and France might've have had a great influx of immigrants proud of becoming one with their new nation but we don't see that nowadays. Of course, happy to blend in migrants exist and I hope those keep coming but more and more I see angry migrants...in Portugal's case angry Brazilians that think we own them something and openly talk about taking our country for themselves... and then we have middle east, Asian migrants that only come for degraded welfare and care little about native culture, people and values, they want to be themselves and live of natives taxes...we already have Gypsies of our own to take care, we can't take more of this mentality of "the natives are bad and we must live of off them"! Fortunately our African migrants from former Portuguese colonies seem to be more in the happy to blend in kind. We see more of the screw the natives mentalities in younger generations for sure, even early Brazilian migrants don't care much for this new wave of compatriots.