Romans 11:26 And so all Israel shall be saved: as it is written, There shall come out of Sion the Deliverer, and shall turn away ungodliness from Jacob:
So shall all Israel be saved, this is who is being addressed if I am not mistaken.
Romans 11:27 For this is my covenant unto them, when I shall take away their sins.
The covenant is unto them-Israel
Romans 11:28 As concerning the gospel, they are enemies for your sakes: but as touching the election, they are beloved for the father's sakes.
Israel has been made enemies for the sake of the Gentiles, BUT and this is a really big BUT as touching the election, they are beloved for the fathers sake, so it is to them that this next verse is written
Romans 11:29 For the gifts and calling of God are without repentance.
So it is to the "election" that the gifts and calling of God are without repentance. I believe.