Jesus Christ Is Israel
It is written:
|Hosea 11:1||Matthew 2:14, 15|
|When Israel was a youth I loved him, and out of Egypt I called My Son.||And he arose and took the Child and His mother by night, and departed for Egypt;
and was there until the death of Herod, that what was spoken by the Lord through the prophet might be fulfilled, saying, “Out of Egypt did I call My Son.”
As Jesus is the true Israel according to Scripture, He is also the true seed of Abraham for it is also written in the Scriptures:
Know then that it is those of faith who are the sons of Abraham.  And the Scripture, foreseeing that God would justify the Gentiles by faith, preached the gospel beforehand to Abraham, saying, "In you shall all the nations be blessed." – Galatians 3:7,8 (ESV)
and as Jesus is the true Israel and Seed of Abraham, the promises of God were made not to natural Israel, but to Abraham and to Christ, for again it is written in the Scriptures:
Now the promises were made to Abraham and to his offspring. It does not say, "And to offsprings," referring to many, but referring to one, "And to your offspring," who is Christ. – Galatians 3:16 (ESV).
There is one plan of redemption throughout history, by faith in Christ, the faith of Abraham, for it is also written in Scripture:
For as many of you as were baptized into Christ have put on Christ.  There is neither Jew nor Greek, there is neither slave nor free, there is no male and female, for you are all one in Christ Jesus.  And if you are Christ’s, then you are Abraham’s offspring, heirs according to promise. –Galatians 3:27-29 (ESV)
Thus there is only one true Israel, Jesus Christ, and none other; one redemptive plan of salvation throughout all history; one Gospel; one people of God –the Church, the Israel of God-by faith having been united to Jesus Christ, the true Israel and made heirs according to the promise of God.
For all the promises of God find their Yes in him. That is why it is through him that we utter our Amen to God for his glory. – 2 Cor. 1:20 (ESV) [emphasis mine].