But the subject in this chapter is explicitly said to be Paul's "kinsmen according to the flesh." there is no way to escape this.
What you do not want to understand is that the scriptures tell us that in a coming day, Abraham's physical seed and his spiritual seed will be the same group, the restored nation of Israel, all of them living in true faith in their ancient homeland.
Here again your "cherry picking" is exposed Biblewriter! Paul NOT ONE TIME speaks of land...so why are you? You're once again departing from what his point is! Let's examine Romans 9:1-5 verse by verse:
Verse 1
1 I am telling the truth in Christ, I am not lying, my conscience testifies with me in the Holy Spirit,
Paul is speaking the truth in Christ...from his conscience IN THE HOLY SPIRIT
Verse 2
2 that I have great sorrow and unceasing grief in my heart.
Pretty simple...Paul is grieving over something.
Verse 3
3 For I could wish that I myself were accursed, separated from Christ for the sake of my brethren, my kinsmen according to the flesh,
Paul wishes he could be "accursed" and separated from Christ for his people. However, what is the reason he says "according to the flesh"?
You would like to make this an issue of "physical Israel" but the real point is we know Paul has received Christ. He is an apostle that is commissioned to go to the Gentiles, and in doing so, we know from the book of Acts that since His conversion, Jews have been trying to kill him, and persecute him for one reason...He no longer walks according to the Old Covenant, he walks in the New Covenant. He also is converting Jews as well as Gentiles, and the hate him for it...but Paul's heart is heavy over them, because they are his kinsmen.
Verse 4
4 who are Israelites, to whom belongs the adoption as sons, and the glory and the covenants and the giving of the Law and the temple service and the promises,
Now we get the point of Paul's grief...his people who are ISRAELITES!!! Paul follows this up so we understand this is about the "Sinaitic Covenant", which is given in Exodus 19-24 where Israel affirms they will do all that God commanded! Moses sprinkles them with blood after that.
Verse 5
5 whose are the fathers, and from whom is the Christ according to the flesh, who is over all, God blessed forever. Amen.
This affirms also the apostle's conclusion...CHRIST IS DESCENDED THROUGH Israel "ACCORDING TO THE FLESH".
This is where you miss the entire point Biblewriter! The summation of this whole thing surrounds CHRIST coming into the world as redeemer...the Redeemer that Israel, on the whole doesn't receive (except the remnant).
The apostle is now going to go forward from here and changes this to a Spiritual matter and he does that on the basis of summation in verse 5 that Christ is the result of the "covenants, the giving of the Law, the temple, and the promises". It is on that basis he wants us to understand that
"it is not as though the word of God has failed. For they are not all Israel who are descended from Israel; nor are they all children because they are Abraham’s descendants,"
They are not all Israel because reject Christ who is the SEED of Abraham!
You flat miss the whole point! Every time you go in a direction the apostle is not going because it will make your view worthless.
This is why you don't want to speak to Galatians, Ephesians, Philippians, Colossians, or even Hebrews. The will TORPEDO you whole theology!
The restoration of Israel is that of them coming to Christ...that's what it's about Biblewriter. You have missed that it's about, which is Christ and all who will come to Him!
What a shame!