1 And when Abram was ninety years old and nine, the LORD appeared to Abram, and said unto him, I am the Almighty God; walk before me, and be thou perfect.
2 And I will make my covenant between me and thee, and will multiply thee exceedingly.
3 And Abram fell on his face: and God talked with him, saying,
4 As for me, behold, my covenant is with thee, and thou shalt be a father of many nations.
5 Neither shall thy name any more be called Abram, but thy name shall be Abraham; for a father of many nations have I made thee.
6 And I will make thee exceeding fruitful, and I will make nations of thee, and kings shall come out of thee.
7 And I will establish my covenant between me and thee and thy seed after thee in their generations for an everlasting covenant, to be a God unto thee, and to thy seed after thee. Genesis 17:1–7.
The Abrahamic Covenant. A covenant in which a man and his wife were given outstanding promises for not only him and his immediate children but for their descendants also. A covenant in which a Redeemer and King would be born to remove the sins of God's covenant people and give them eternal life. And from this day forward God has been working to that end using only this covenant and no other for there is no other Name by which anyone will be saved but the Name of God: Yahweh (YHWH.) It is only through this covenant will God save His Chosen people Israel. But God has made no covenant with Gentiles. But Gentiles are not excluded for there are many prophecies through the decades sent to Israel from God's prophets that Gentiles will be included, and we later find from the writings of Paul, grafted in along with the natural branches of the Olive Tree, which is Israel, that Israel will be the light to lead the Gentiles to Jerusalem to worship God alongside them.
The Church, or Great Congregation of the LORD is Israel. The Bride of Christ is Israel for God says in the Old Testament that He is betrothed to Israel forever. But God has made no covenant with Gentiles.
When all is said and done, and Israel's Messiah and King sits on the throne of David to rule His people from Jerusalem there will be a Marriage Supper of the Lamb and His Bride. Israel is there by covenant, but Gentiles will be there by invitation.
God has made no covenant with Gentiles.
But you Gentiles have receive an invitation to partake of the blessings God has bestowed upon Abram, Isaac, and Jacob, and the twelve tribes of Israel and their descendants.
11 I say then, Have they stumbled that they should fall? God forbid: but rather through their fall salvation is come unto the Gentiles, for to provoke them to jealousy. 1
2 Now if the fall of them be the riches of the world, and the diminishing of them the riches of the Gentiles; how much more their fulness?
13 For I speak to you Gentiles, inasmuch as I am the apostle of the Gentiles, I magnify mine office:
14 If by any means I may provoke to emulation them which are my flesh, and might save some of them.
15 For if the casting away of them be the reconciling of the world, what shall the receiving of them be, but life from the dead?
16 For if the firstfruit be holy, the lump is also holy: and if the root be holy, so are the branches.
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;
18 Boast not against the branches. But if thou boast, thou bearest not the root, but the root thee.
19 Thou wilt say then, The branches were broken off, that I might be graffed in.
20 Well; because of unbelief they were broken off, and thou standest by faith. Be not highminded, but fear:
21 For if God spared not the natural branches, take heed lest he also spare not thee.
22 Behold therefore the goodness and severity of God: on them which fell, severity; but toward thee, goodness, if thou continue in his goodness: otherwise thou also shalt be cut off.
23 And they also, if they abide not still in unbelief, shall be graffed in: for God is able to graff them in again.
24 For if thou wert cut out of the olive tree which is wild by nature, and wert graffed contrary to nature into a good olive tree: how much more shall these, which be the natural branches, be graffed into their own olive tree?
25 For I would not, brethren, that ye should be ignorant of this mystery, lest ye should be wise in your own conceits; that blindness in part is happened to Israel, until the fulness of the Gentiles be come in.
26 And so all Israel shall be saved: as it is written, There shall come out of Sion the Deliverer, and shall turn away ungodliness from Jacob:
27 For this is my covenant unto them, when I shall take away their sins.
28 As concerning the gospel, they are enemies for your sakes: but as touching the election, they are beloved for the fathers’ sakes.
29 For the gifts and calling of God are without repentance. Romans 11:11–29.
All well and good but God has made no covenant with Gentiles.