I don't think you can make a facile pronouncement that European countries and ethnically and culturally homogenous any longer. We can't have a High-trust society in the USA when politicians scapegoat immigrants, in spite of their being more law-abiding on the whole. We can't avoid having a demoralized populace when corporate funded politicians of both parties drag their feet instead of giving citizens of the most productive and wealthy country in the history of the world parity with less wealthy countries, in terms of healthcare, education, housing, retirement and lack of life precariousness, like going into bankruptcy over medical debt...