In chapter 11,
1) Paul starts by pointing out that God has always kept a remnant of the faithful even when the vast majority were in open idolatry.
2) He goes on to point out that the Gentiles partake of Israel's (family) tree by a miracle of God. He warns that the Gentile branches can be broken off just as swiftly as the natural branches.
3)
3) And it is in the light of the above that he said, "all Israel will be saved, as it is written . . . Concerning the Gospel, they are enemies for your (the Gentiles') sakes, but in regards to election, they are beloved for the Patriarch's sakes."
The only way you can get around that plain interpretation is to either deny the "remnant of Israel now/all of Israel in the future" dichotomy that Paul is clearly setting up or to claim that the Church is the enemy of the Gospel because of the Gentiles that were grafted in. Frankly, I know Jews who might agree with that second interpretation, given how the visible church has treated the Lord's people in the name of a distorted "gospel"--but I wouldn't think that you'd prefer that interpretation to a straightforward reading that the Father will be reconciled with His firstborn son.
Shalom.
INDEED.
However, on starting to read truth like that, REPLACEMENTARIANS, et al
seem to plug ears, blind eyes and mutter loudly to themselves to block out any semblence of truth getting any where near their synapses.