The story of the New Testament is that a descendant of Abraham—Jesus—died and rose again to redeem not only Abraham’s ethnic descendants (Israelites/Jews) but also all the people among the nations who had formerly been disinherited from the true God. In the verses quoted just above, Paul called the inclusion of Gentiles in the family of God a mystery. It astonished him that people from the nations God had cast off, and which were under the control of other gods, could inherit the promises given to Abraham.
