But I’ll clarify that I wrote that Spain, Portugal and Greece specifically have become dynamic economies in the context of the EU. Spain has grown at a consistent 3% for a decade. Of course the far-right argues that it’s the wrong kind of growth because it’s fueled by immigration (backwards-looking political movements prefer zero growth and a shrinking population if it means less people of the color they don’t like).
Half of the middle-schoolers in Vienna (Austria's capital) are now muslim:
https://www.heute.at/s/494-der-kinder-an-wiens-mittelschulen...
In France the DZ (Algerian) mafia is powerful enough to violently intimidate prison personnel and attack prisons:
https://www.latribune.fr/la-tribune-dimanche/societe/attaque...
In Netherlands, "Mokro" (Moroccan) mafia forced the heir to leave the country, after putting a price on her head.
https://www.wsj.com/world/europe/europe-drugs-gangs-organize...
So yeah, I guess that some locals can not commune together with you about the immense benefits unrestrained immigration brings to their countries.
You are free to personally visit Brussels to see what a shit hole it is.