Commonwealth of Israel / Jews

Psalm 121:8 Yahuweh shall preserve thy going out and thy coming in from this time forth, and even for evermore.
This is a quote of the covenant from Deuteronomy 28.
Romans 2:28 But he is a Jew, which is one inwardly; and circumcision is that of the heart, in the spirit, and not of men, but of God.
Ephesians 2:11-12 Wherefore remember, that you being in time past Gentiles in the flesh, who are called Uncircumcision by which is called the Circumcision in the flesh made by hands; 12 That at that time you were without Christ, being aliens from the commonwealth of Israel, and strangers from the covenants (Plural) of promise, having no hope, and without God in the world.
Romans 9:4 Who are Israelites; to whom pertaineth the adoption, and the glory, and the covenants, and the giving of the law, and the service of God,
and the promises;
Romans 11: 17 And if some of the branches be broken off, and thou, being a wild olive tree, wert graffed in among them, and with them partakest of the root and fatness of the olive tree;   read18-36
The children of Abraham (not of flesh but of faith in Messiah's blood) are those who God has called. Throughout the New Testament the promise was to us by faith. Access to all the promises and covenants, which only are given to Israel. The Church, which is the body of Messiah, has been grafted in to the Commonwealth of Israel to whom the covenants pertain.
The promise of a Messiah was only given to Israel. The promises in the old covenant in Deuteronomy were given to Israel. Yahushua full filled them so we could share in the covenant promises. Isaiah 53:4-5 's promises were to Israel but we have been grafted into the commonwealth of Israel.
These things are not a matter of doctrine or interpretation, Paul repeats explanations throughout his epistles.
Hebrews 10:14 For by one offering He hath perfected for ever them that are sanctified. Read chapters 8-10
Galatians 6:15-16 For in Messiah Yahushua neither circumcision avail any thing, nor uncircumcision, but a new creature. 16 and as many as walk according to this rule, peace be on them, and mercy, and upon the Israel of God. Psalm 73:1
Father Halle lu Yahuweh we are part of the Israel of God. Blessings on the name of Your Son, YAHUSHUA