That's a remarkably recent perspective. It didn't even begin to emerge until the time of Napoleon. Jews were reliably treated as foreign citizens almost everywhere. This was because they had been autonomous until shortly after the time of Christ. So for European Christians, Jewish Nationality was seen as very well documented. Napoleon flipped things on their head by holding a meeting with the French Rabbinate (on Shabbos, I might add) where he gave them citizenship. People bought into this across Europe as the nineteenth century progressed, eventually urged on by Germanic Jewish Theologians culminating with Hermann Cohen. After the Dreyfus Fiasco a small but loud minority emerged. They said, "All these Nations are attached to land to which we have no blood connection" and became Zionist, Jewish Nationals. The Holocaust lent credence to their argument. These countries didn't truly see Jews as citizens. They decided to leave, go to a land that being Jewish was connected to. (Other folk had moved in during the millennia of Jewish diaspora, leading to a whole new shit show) In any case, the Germans never saw the Jews as full citizens, and by the time the war was over the Jews didn't see things that way either.