Jesus said to certain Jews, "You are of your father the devil, who was a murderer from the beginning". In anther place He told them that they were as Cain, guilty of the blood of "all the prophets from righteous Able to Zechariah whom you slew between the porch and the alter"..... He also said, "Do not think to have Abraham as your father, I can of the stones raise up children to Abraham."
Joh 8:56 Your father Abraham rejoiced to see My day, and he saw it and was glad."
It is important to understand that the Jews are identified IN ABRAHAM, the father of faith. Jesus makes it CLEAR that the children of Abraham, the true Jews, were PEOPLE OF FAITH.
The natural tree we are grafted into is is ROOTED IN ABRAHAM, and runs through DAVID(Ro 1:3), the branches are children of faith, men and women after God's own heart, Jews and Gentiles.
"The axe is laid to the root of the trees"...."the natural branches were cut -off because of unbelief, but they can be grafted back in again" and will, because "all Israel will be saved"....when? in the ages to come perhaps....."Do not boast yourselves over the branches that were cut off"... Why? Because you will be cut off for your arrogance, not seeing that God loves them for the sake of the forefathers and is determined to redeem them all again and we are supposed to be the instrument of that,
I say then, have they stumbled that they should fall? Certainly not! But through their fall, to provoke them to jealousy, salvation has come to the Gentiles. Now if their fall is riches for the world, and their failure riches for the Gentiles, how much more their fullness!
(Rom 11:11-12)
They
will be made full, but
For they being ignorant of God's righteousness, and seeking to establish their own righteousness, have not submitted to the righteousness of God. For Christ is the end of the law for righteousness to everyone who believes.
(Rom 10:3-4)
Those who approached the law to establish their own righteousness are the branches that hav been cut-off
"All day long I hold forth my hands to a stubborn and a rebellious people".
Paul, in Galatians likens these to Hagar and Ishmael, not Sarah and Israel, slaves not sons. But one only need to come under grace, believe and bow to the love of God in Christ Jesus in order to move from slave to son.
Christians, who approach the gospel "to establish their own righteousness" make it into law and letter FARE NO BETTER THAN THE JEWS WHO WERE CUT OFF, for God is no respecter of persons. They walk as slaves not sons.
For there is no distinction between Jew and Greek, for the same Lord over all is rich to all who call upon Him. For "whoever calls on the name of the LORD shall be saved."[g]
(Rom 10:12-13)
For you are all sons of God through faith in Christ Jesus. 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 neither male nor female; for you are all one in Christ Jesus. And
if you are Christ's, then you are Abraham's seed, and heirs according to the promise.(Gal 3:26-29)
The tree is a tree of faith, out of Abraham, the seed being one seed is Christ. All those who are of the faith of Abraham are the true Jews, those natural Jews who were people of faith(Backwards from Christ) are in that tree. Those Gentiles who hav become children of Abraham(forward from Christ) in the SEED who is Christ are grafted into it. That tree is the tree of the CHILDREN OF THE FAITH OF ABRAHAM. Any branch, having been cut ofF for unbelief, may repent and be grafted back in, and eventually the tree will encompass all of creation.
For you are all sons of God through faith in Christ Jesus. 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 neither male nor female; for you are all one in Christ Jesus. And if you are Christ's, then you are Abraham's seed, and heirs according to the promise.
(Gal 3:26-29)
The in gathering that began with Abraham is being completed through Christ and His first act in it was to "break down the dividing wall".
the mystery...... which in other ages was not made known to the sons of men, as it has now been revealed by the Spirit to His holy apostles and prophets: that the Gentiles should be fellow heirs, of the same body(with the Jews), and partakers of His promise in Christ through the gospel,
(Eph 3:5-6)
So in the end, after Christ yields all things to the Father, all rule power and authority will be dissolved and not only will their be no Jew or Gentile but all will be one in God and God will be all in all. The first step in that glorious mystery was gathering Jew and Gentile into one tree, a tree of faith.