That is true. But the covenant with Israel was a national, earthly covenant. The covenant the redeemed are a part of is not in the same league.
The New Covenant was by Faith, and contains the promises given Abraham,
which includes the promises of inheritance:
Gal 3:18
18 For if the inheritance be of the law, it is no more of promise: but God gave it to Abraham by promise.
KJV
Gal 3:28-29
28 There is neither Jew nor Greek, there is neither bond nor free, there is neither male nor female: for ye are all one in Christ Jesus.
29 And if ye be Christ's, then are ye Abraham's seed, and heirs according to the promise.
KJV
You're still wanting to believe in Salvation by flesh, using blood birth, when all along God's Promise to Abraham was by FAITH (i.e., the New Covenant).
Gal 3:21-22
21 Is the law then against the promises of God? God forbid: for if there had been a law given which could have given life, verily righteousness should have been by the law.
22 But the scripture hath concluded all under sin, that the promise by faith of Jesus Christ might be given to them that believe.
KJV
Jeremiah 31:31-32 Behold, days are coming,” declares the Lord, “when I will make
a new covenant with the house of Israel and with the house of Judah, 32
not like the covenant which I made with their fathers in the day I took them by the hand to bring them out of the land of Egypt, My covenant which they broke, although I was a husband to them,” declares the Lord.
The covenant is with the Hebrew people just like the Sinai covenant was.
No, the New Covenant is with ALL peoples who believe on Jesus Christ as their Saviour. And like Apostle Paul said in Gal.3, they inherit WITH Abraham, and have become the children of Abraham!
I've shown you Galatians 3 about this, which you've said nothing.
I've shown you what Jesus said about the unbelieving "children of the kingdom" being cast out.
I've shown you what Apostle Paul said to Gentiles with their inheriting the covenants and promises with becoming part of the "commonwealth of Israel".
Now I show you this...
Rom 9:24-26
24 Even us, whom He hath called, not of the Jews only, but also of the Gentiles?
25 As He saith also in Osee, "I will call them My people, which were not My people; and her beloved, which was not beloved.
26 And it shall come to pass, that in the place where it was said unto them, 'Ye are not My people'; there shall they be called the children of the living God."
KJV
That was Apostle Paul speaking to Gentile Roman believers, along with scattered Israelite believers, i.e., Christ's Church.
A problem with that though; God originally gave that passage in Hosea only about the rebellious "house of Israel", the ten tribes. God told Hosea to take a prostitute for wife, and He named Hosea's children to symbolize how Israel (ten tribes) had rebelled against Him, and how He was getting ready to scatter them. So God called one of the children born to Hosea as "Lo-ammi", which means 'not My people'. But in final, God said that in the land where that was said, it will be said to them, "Ye are the sons of the living God." (Hosea 1:10).
But here in Romans 9, Apostle Paul is applying that Hosea passage to Christ's Church!
That is yet another Bible proof that the gathering to Christ Jesus involving believing Israel is for BOTH believing Israelite and believing Gentile, as ONE BODY, together.
Isa 49:22
22 Thus saith the Lord GOD, Behold, I will lift up mine hand to the Gentiles, and set up My standard to the people: and they shall bring thy sons in their arms, and thy daughters shall be carried upon their shoulders.
KJV
Isa 54:2-3
2 Enlarge the place of thy tent, and let them stretch forth the curtains of thine habitations: spare not, lengthen thy cords, and strengthen thy stakes;
3 For thou shalt break forth on the right hand and on the left; and thy seed shall inherit the Gentiles, and make the desolate cities to be inhabited.
KJV
So Christ's Salvation is not... just about flesh-born Israelite believers being joined back to the holy lands? That's right. It's about Christ's Church of both believing Israelite and believing Gentile joined there under Jesus.