That is incorrect aged man. There is no ethnic separation of believers in the Church.
Galatians 3:26-29
26. For ye are all the children of God by faith in Christ Jesus.
27. For as many of you as have been baptized into Christ have put on Christ.
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.
You might also check Ephesians 2.
You are correct.
IN THE CHURCH there are no "ethnic differences."
Although, in the Scriptures, Paul states in Galatians (working from feeble memory) that Paul was a missionary to the uncircumcised, and Peter to the circumcised. So even the Scriptures do indicate a ethnic division that continues at this time.
However, I was addressing that Israel, which is now estranged - both by history of persecution and by blindness imposed by God - from the church, though there were and are a remnant of Jews who embrace the truth.
You disagree because you consider the church is Israel - I do not.
Also, I was addressing that during the millennial reign, the church and Israel will be united into a single believing body - no longer estranged from each other or from God.
You disagree because you don't consider that there will be a future 1000 year reign.
That is why I can agree with your statement and proof of Paul, yet still hold to what I stated as factual.
My thinking of Romans is that the gentiles are grafted into Israel.
Paul is very specific concerning the political Israel in its current state:
11 I say then, God has not rejected His people, has He? May it never be! For I too am an Israelite, a descendant of Abraham, of the tribe of Benjamin. 2 God has not rejected His people whom He foreknew....
11 I say then, they did not stumble so as to fall, did they? May it never be! But by their transgression salvation has come to the Gentiles, to make them jealous. 12 Now if their transgression is riches for the world and their failure is riches for the Gentiles, how much more will their fulfillment be! ...
19 You will say then, “Branches were broken off so that I might be grafted in.” 20 Quite right, they were broken off for their unbelief, but you stand by your faith. Do not be conceited, but fear; 21 for if God did not spare the natural branches, He will not spare you, either. ...
25 For I do not want you, brethren, to be uninformed of this mystery—so that you will not be wise in your own estimation—that a partial hardening has happened to Israel until the fullness of the Gentiles has come in; 26 and so all Israel will be saved; just as it is written, ...
28 From the standpoint of the gospel they are enemies for your sake, but from the standpoint of God’s choice they are beloved for the sake of the fathers; 29 for the gifts and the calling of God are irrevocable. ...
30 For just as you once were disobedient to God, but now have been shown mercy because of their disobedience, 31 so these also now have been disobedient, that because of the mercy shown to you they also may now be shown mercy. 32 For God has shut up all in disobedience so that He may show mercy to all.
I am not wrong, you just perceive me as being wrong because of the direction you are facing while we both stand on the same rock and look at the horizon.