The barrier between many Jewish Christians and Christians who were not Jewish was enormous. The barrier was constructed of religious perspectives, cultural views, moral and ethical criteria, social customs, and physical heritage. From the Jewish perspective, God laid the foundations of that barrier in His promises to Abraham, erected the barrier in God's covenant with Israel at Sinai, and renewed the barrier in His promises through the prophets. God intended Jewish Christians and Christians who were not Jewish to be God's single community. It could happen if Christians who were not Jews, as God's stewards, shared material things with Jewish Christians.
Christian stewardship is that powerful today.