John 8:56. "Your father Abraham rejoiced to see My day, and he saw it and was glad."Israel of the Old Testament is not the church which is the body of Christ. Abraham was not a Christian.
I deny the very concept of 'replacement theology.' It is just a stick that Dispensationalists pick up to try to beat the rest of us with.
The correct term would be 'Fulfillment' or 'Inclusion' Theology.' 'For He Himself is our peace, who has made both [Jew and Gentile] one, and has broken down the middle wall of separation, having abolished in His flesh the enmity, that is, the law of commandments contained in ordinances, so as to create in Himself one new man from the two, thus making peace, and that He might reconcile them both to God in one body through the cross' (Eph. 2:14-16).
The inclusion of the Gentiles is all over the O.T., starting with Genesis 12:3.