People, God did not reject his people Israel, they were cast off because of unbelief, but they will be grafted in if they don't continue in that Unbelief.
The prophets testified to that very thing. Moses, Hosea, for thru that
Very one, was testified, HE WILL CALL THEM HIS PEOPLE WHO ARE NOT HIS PEOPLE.
Christ came to make the two-one, so that in him they could both have access to God, so that the two of them should become one house of God, and in Christ there is no different in the two.
the two different people's have become one, and that IS the house of GOD, we are both under that new covenat.
Peter testifies to that very thing as us being God's house now, for he says, we are a chosen poeple, a royal preisthood, A HOLY NATION.
Peter addresses those who are now in Christ, as God's holy,chosen Nation, and according to scripture that could be no other THAN ISRAEL. THERE IS NO OTHER HOUSE GOD CHOOSES OUT OF THE NATIONS FOR HIMSELF.
Together, Israel and the Gentiles have become one house, in Christ, THAT'S WHAT SCRIPTURE SAYS.
I would never boast over a Jew that hasn't accepted Christ, Christ died for them, and I would pray that he does put them back in the tree!! But the beauty of Christ is this, no one is Chosen apart from him, but Anyone on the face of the EARTH becomes God's house. A house is where you live and in CHRIST, we become the temple of God, each as indivual living stones, who on the resurrection day will all come Togther to be his temple forever.
In the 'equality' of Jews and Gentiles Christian, that you keep on 'bragging' about, of Gentiles being grafted to that tree, therefore know this for sure in the name of LORD JESUS CHRIST that, there is a possibility of you, Gentiles being 'cut off' once again and left to wither, while they the Jews remain intact. Go and pay attention to Romans 11;13-24 and stop bragging on and on your version of 'equality'.
Witnesses of CHRIST, i have nothing against Gentiles who know and remember their 'place' and 'standing' according to the New Testament/Covenant Spiritual knowledge, in submission and obedience to GOD and not to the Jews at all. But i am against, in order for them to repent to GOD, those who are 'proud braggers', who think they know everything but as a matter of fact they know nothing, meaning their 'testimony' is 'incomplete' and so they remain in 'unbelief' ignorantly and they rather talk about Israel's 'unbelief' instead.
According to the Old Testament/Covenant, the whole of Israel have turned back to GOD in repentance, in their desperation to be saved from their enemies, when GOD personally came down to their rescue.
As it is written in Romans 11;25-29, referring to the Gentiles that;
25."Lest you be wise in your own conceits. I want you to understand this mystery brothers; a partial hardening has come upon Israel, untill the fullness of the Gentiles has come in. 26.And in this way 'All Israel will be saved', ......................................................................................................................"