> This assumes that the migrants for that 100 years go live in decoupled ghettos and never integrate with the native population. There is a sizable Turkish min

> This assumes that the migrants for that 100 years go live in decoupled ghettos and never integrate with the native population. There is a sizable Turkish minority in Germany, starting from the Gastarbeiter programs of the 1960s, around 80 years ago. Integration hasn't been great, with even today those of Turkish ethnic origin being 20% unemployed vs. 6% for the ethnic Germans. Of course, there are many complex reasons for this: Germans didn't want Turks to become Germans to a degree, with those of Turkish origin not being eligible for German citizenship until 2000. Erdogan gave a speech on German soil encouraging Turks to not assimilate into German culture. And obviously someone of Turkish origin whose family immigrated 80 years ago would likely behave differently than a newcomer. > Otherwise, what do you call someone born in Italy, to parents born in Italy, and their grandparents were born in Italy, Italy, Nigeria and Ukraine? Half of their ancestry is Italian and that might convince most Italians to call them Italian, if they speak, behave, and mostly look like other Italians. But what if their grandparents were born in Nigeria, Ukraine, Iraq, and Pakistan? Old World countries are not the same as New World countries in that regard. The majority of Koreans, for example, would not consider someone who wasn't ethnically Korean to be Korean even if they spoke the language fluently, was in tune with the culture, and was born in Korea. Jus sanguinis applies culturally as well as legally.