Who taught you that Rom 11:25ff makes us into Jews? No, Israel (the part that did not receive Christ) is blind by now, but when the time comes, the cover will be removed from their eyes, they will see and come to the Lord, and whole Israel will be saved. That has nothing to do with us Gentiles.
I do not want you to be ignorant of this mystery, brothers and sisters, so that you may not be conceited: Israel has experienced a hardening in part until the full number of the Gentiles has come in, and in this way all Israel will be saved.
Nothing in the use of "part" in these sentences implies we are this part. You are utterly wrong.
We Gentiles enter salvation, but as a separate people(in James terminology in Acts 15). Jews will have to cope with the question whether the Law, which is not undone by Jesus, has to be kept by them, we Gentiles are not bound to this law, and to burden us with that is no healthy teaching (Gal 2:14-18). We are not part of all Israel which is shown in Rev 7:1-8, we are the multitude out of all tribes, peoples, languages (Rev 7,10ff), and we will (together with all Israel) be his peoples (there is a plural in the Greek in Rev 21:3!).
What you say is close to replacement theology, which deprives the Jews from their inheritance.We have to see the differences between Jews, Non-Jews ("Greeks" in 1.Co 10:32) and the Church.
Hmmm Nope! God's ISRAEL according to the scriptures under the new covenant are all those who believe and follow God's Word. There is no more hope for Israel as a nation anymore. Only Jews as individuals who believe and follow God's Word can be saved. Gentile believers are now also grafted into Gods ISRAEL in the new covenant, which is Jesus Christ, the "seed of Abraham".
"And if ye be Christ's, then are ye Abraham's seed, and heirs according to the promise." (Galatians 3:29) This is why Jesus said
"I am the vine, ye are the branches: He that abideth in me, and I in him, the same bringeth forth much fruit: for without me ye can do nothing." (John 15:5).
There is no such thing as Jew or Greek anymore. All who believe and follow God's Word are one in Christ. Israel in the OLD COVENANT were those from the seed of Abraham. In the NEW COVENANT, if you are in Christ then you are Abraham's seed and heirs according to the promise...
EPHESIANS 2:11-14 [11], Why remember, that you being in TIME PAST Gentiles in the flesh, who are called Uncircumcision by that which is called the Circumcision in the flesh made by hands;
[12], That AT THAT TIME [in the Past] YOU WERE WITHOUT CHRIST, BEING ALIENS FROM THE COMMONWEALTH OF ISRAEL, STRANGERS FROM THE COVENANT OF PROMISE, HAVING NO HOPE, AND WITHOUT GOD IN THE WORLD: [13], BUT NOW IN CHRIST JESUS, YOU WHO WERE FAR OFF ARE MADE NEAR BY THE BLOOD OF CHRIST.
GALATIANS 3:28-29 [28], THERE IS NEITHER JEW NOR GREEK, there is neither bond nor free, there is neither male nor female: FOR YOU ALL ONE IN CHRIST JESUS AND IF YOU BE CHRISTS, THEN YOU ARE ABRAHAM'S SEED FOR YOU ARE ALL ONE IN CHRIST JESUS [29], and IF YOU BE CHRISTS, THEN ARE YOU ABRAHAM'S SEED, AND HEIRS ACCORDING TO THE PROMISE.
God's true ISRAEL in the NEW COVENANT are not by name only but all those in Christ. Those of the FLESH (sinful human nature) are not Abrahams seed but those who BELIEVE and FOLLOW God in Christ are God's ISRAEL...
ROMANS 9:6-8 [6], FOR THEY ARE NOT ALL ISRAEL WHICH ARE OF ISRAEL,: [7], NEITHER, BECAUSE THEY ARE THE SEED OF ABRAHAM, ARE THEY ALL CHILDREN: but in Isaac shall thy seed be called <Christ> [8], That is, THEY WHICH ARE THE CHILDREN OF THE FLESH, THESE ARE NOT THE CHILDREN OF GOD: BUT THE CHILDREN OF THE PROMISE <those who believe> ARE COUNTED FOR THE SEED.
God's ISRAEL are all those in CHRIST that have been given a NEW HEART according to the NEW COVENANT promise...
ROMANS 2:28-29 [28], FOR HE IS NOT A JEW WHICH IS ONE OUTWARDLY; NEITHER IS THAT CIRCUMCISION, WHICH IS OUTWARDS IN THE FLESH: [29], BUT HE IS A JEW WHICH IS ONE INWARDLY; and CIRCUMCISION IS OF THE HEART, IN THE SPIRIT, AND NOT IN THE LETTER; whose praise is not of men, but of God.
In the NEW COVENANT all those in Christ are are God's ISRAEL...
COLOSSIANS 3:11 [11], WHERE THERE IS NEITHER JEW NOR GREEK circumcision nor uncircumcision, Barbarian, Scythian, bond nor free: BUT CHRIST IS ALL IN ALL.
ROMANS 10:11-13 [11], For the scripture saith, Whosoever believeth on him shall not be ashamed. [12], FOR THERE IS NO DIFFERENCE BETWEEN JEW OR GREEK: for the same Lord over all is rich unto all that call upon him. [13], FOR WHOSOEVER SHALL CALL UPON THE NAME OF THE LORD SHALL BE SAVED.
The New Covenant is for God's Israel...
EZEKIEL 36:26-27 [26], A NEW HEART WILL I GIVE YOU, AND A NEW SPIRIT WILL I PUT WITHIN YOU; AND I WILL TAKE AWAY THE STONY HEART OUT OF YOUR FLESH, AND GIVE YOU A HEART OF FLESH. [27], AND I WILL PUT MY SPIRIT WITHIN YOU, AND CAUSE YOU TO WALK IN MY STATUTES AND YOU SHALL KEEP MY JUDGEMENTS AND DO THEM.
and again...
JEREMIAH 31:33-34 [33], BUT THIS IS THE COVENANT THAT I WILL MAKE WITH THE HOUSE OF ISRAEL; After those days, says the LORD, I WILL PUT MY LAW IN THEIR INWARD PARTS,AND WRITE IT IN THEIR HEARTS; and will be their God, and they shall be my people. [34], And they shall teach no more every man his neighbour, and every man his brother, saying, Know the LORD: for they shall all know me, from the least of them unto the greatest of them, says the LORD: for I will forgive their iniquity, and I will remember their sin no more.
Paul proclaims it here...
HEBREWS 8:10-12 [10], BUT THIS IS THE COVENANT THAT I WILL MAKE WITH THE HOUSE OF ISRAEL; After those days, says the LORD, I WILL PUT MY LAW IN THEIR INWARD PARTS, AND WRITE IT IN THEIR HEARTS; and I will be to them a God, and they shall be to me a people: [11], And they shall not teach every man his neighbour, and every man his brother, saying, Know the Lord: for all shall know me, from the least to the greatest. [12], For I will be merciful to their unrighteousness, and their sins and their iniquities will I remember no more.
The NEW COVENANT is for GOD'S ISRAEL which represent those who BELIEVE and FOLLOW God’s WORD.
If you are not part of GOD'S ISRAEL then you are not a part of the NEW COVENANT (
Hebrews 8:10-12).
Probably enough scripture provided here for now.
If you need more scripture you can find more here...
1.
ORIGIN OF ISRAEL AND THE 12 TRIBES linked
2.
MEANING OF THE NAME OF GOD'S ISRAEL linked
3.
GOD'S ISRAEL IN THE NEW COVENANT linked
4.
GENTILES ARE NOW GRAFTED IN WITH GOD'S ISRAEL linked
Sorry dear friend, it seems God's Word (not mine) disagrees with you.
May God bless you as you seek him through his Word.