Hi Notmyown,
I agree with the scripture in Romans. It is those of the faith who are children of God. I'm not sure what your question is with what I wrote, but I'll try to explain my answer and see if that helps.
One point I'm trying to stress is that the nation of Israel has a unique relationship with God than any other nation of the world. And it goes all the way back to Genesis with Abraham. God has a future plan for Israel.
And the reason I stressed the descendants of Abraham is because the Everlasting Covenant made with Abraham, Isaac and Jacob continued on through their descendants all the way through to the Messiah who is/was Jewish. He's Israel's promised Messiah. He came to the Jew first and then to the gentile. Israel the nation still belongs to Him;He set His love upon them, made them into a great nation, made both covenants with them and is continuing to work in the hearts of the Jewish nation to bring them to Him.
They've suffered so much and rightly so because of their sin and their turning their backs on Him. But in every generation there is a remnant of Jews that love and serve Him with all their heart.
You'll find more about their future in Ezekiel, Jeremiah, Isaiah and Zechariah and Daniel and there may be others. Those are the ones that come to me from memory at the moment. When all Israel is saved, it's prophesied that 2/3 of her will die and 1/3 of the Jewish nation will be His. They will repent, see Whom they have pierced and weep over their sins as a nation. And so all (the 1/3 that's alive) Israel will be saved.
Here's a future prophecy for Israel. Ezekiel 36:
22 “Therefore say to the house of Israel, Thus says the Lord God: It is not for your sake, O house of Israel, that I am about to act, but for the sake of my holy name, which you have profaned among the nations to which you came. 23 And I will vindicate the holiness of my great name, which has been profaned among the nations, and which you have profaned among them. And the nations will know that I am the Lord, declares the Lord God, when through you I vindicate my holiness before their eyes. 24 I will take you from the nations and gather you from all the countries and bring you into your own land. 25 I will sprinkle clean water on you, and you shall be clean from all your uncleannesses, and from all your idols I will cleanse you. 26 And I will give you a new heart, and a new spirit I will put within you. And I will remove the heart of stone from 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 be careful to obey my rules. 28 You shall dwell in the land that I gave to your fathers, and you shall be my people, and I will be your God. 29 And I will deliver you from all your uncleannesses. And I will summon the grain and make it abundant and lay no famine upon you. 30 I will make the fruit of the tree and the increase of the field abundant, that you may never again suffer the disgrace of famine among the nations. 31 Then you will remember your evil ways, and your deeds that were not good, and you will loathe yourselves for your iniquities and your abominations. 32 It is not for your sake that I will act, declares the Lord God; let that be known to you. Be ashamed and confounded for your ways, O house of Israel.
33 “Thus says the Lord God: On the day that I cleanse you from all your iniquities, I will cause the cities to be inhabited, and the waste places shall be rebuilt. 34 And the land that was desolate shall be tilled, instead of being the desolation that it was in the sight of all who passed by. 35 And they will say, ‘This land that was desolate has become like the garden of Eden, and the waste and desolate and ruined cities are now fortified and inhabited.’ 36 Then the nations that are left all around you shall know that I am the Lord; I have rebuilt the ruined places and replanted that which was desolate. I am the Lord; I have spoken, and I will do it.
37 “Thus says the Lord God: This also I will let the house of Israel ask me to do for them: to increase their people like a flock. 38 Like the flock for sacrifices, like the flock at Jerusalem during her appointed feasts, so shall the waste cities be filled with flocks of people. Then they will know that I am the Lord.”