Jewish diaspora existed way before the fall of Jerusalem. Before Jewish-Roman wars, 10% of Roman Empire was Jewish, about 8 million with only 2 million living i

Jewish diaspora existed way before the fall of Jerusalem. Before Jewish-Roman wars, 10% of Roman Empire was Jewish, about 8 million with only 2 million living in Judea. 1 million Jews lived in Persia (probably the ones that stayed when Babylonian captivity ended, since only 50,000 came back with Zerubbabel to build the second temple)