Jews are all over the world?

Because the Jews died. So you must go into exile all over the world. Jews are a matriarchal society. That is, as long as your mother is Jewish, then you are Jewish. Jews are not extinct in the world because they have their own religion Judaism. Another reason is that Jews are excluded. Generally speaking, a nation-state is the most exclusive. Europe is basically a nation-state and all believe in Catholicism. But Jews who immigrated to the United States were quickly melted. In fact, many Jews came to China along the Silk Road in ancient times, but they soon became China people and forgot their Jewish identity. The main reason is that China is a melting pot country like the United States.