I believe we can learn a lot from the history of the Jews of Europe. In many ways they are the first, the oldest Europeans. We, the new Europeans, are just starting to learn the complex art of living with multiple allegiances The Jews have been forced to master this art since antiquity. They were both Jewish and Italian, or Jewish and French, Jewish and Spanish, Jewish and Polish, Jewish and German. Proud of their ties with Jewish communities throughout the continent, and equally proud of their bonds with their own country.
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Meer et al. (2012) studied this question.
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