Mass Migrations:In eastern Europe waves of persecution of Jews swept through Russia and Romania between 1880 and 1922.The policy of the czarist government was to remove Jews from their jobs and force them to give up their own religion.The Jews could not bear the harsh conditions and began the largest mass migration in Jewish history.Between 1881 and 1919 more than 2 million Jews left Russia and Romania for the United States.This marked the beginning of the shift of the center of the Jewish population from the Old World to the New.◼ Mass Migrations: In eastern Europe waves of persecution of Jews swept through Russia and Romania between 1880 and 1922. The policy of the czarist government was to remove Jews from their jobs and force them to give up their own religion. The Jews could not bear the harsh conditions and began the largest mass migration in Jewish history. Between 1881 and 1919 more than 2 million Jews left Russia and Romania for the United States. This marked the beginning of the shift of the center of the Jewish population from the Old World to the New