Rather than continue this in that thread, I thought it better to do it in a new one, and study that allegory keeping in mind what Jesus said in the parable of the Vine and the Branches in John 15, and what He said in the other gospels.
While the Holy Spirit through Paul gave us a detailed revelation of the true Gospel of Jesus Christ in the chapters preceding Chap 11 in Romans, I believe that Paul in his olive tree allegory gave a biased view that elevated Israel to a place it does not have/hold in the salvation process.
Why do I say this?
Take a look at the phrases I highlighted in Rom 11:11-12
11 Again I ask: Did they stumble so as to fall beyond recovery? Not at all! Rather, because of their transgression, salvation has come to the Gentiles to make Israel envious.
12 But if their transgression means riches for the world, and their loss means riches for the Gentiles, how much greater riches will their full inclusion bring!
The above statements are not true on several counts.
Israel’s transgression of rejecting Jesus Christ to the point of having Him crucified, did not bring reconciliation and salvation to anyone.
The Father through His Son did:
First by sending His Son to pay the penalty for all sin (including Israel’s transgression),
and through His blood to obtain forgiveness for all sin (including Israel’s transgression).
This is what brought reconciliation between God and man -- “riches for the world" – not Israel’s transgression.
Salvation for the Gentiles was hardly an afterthought that came about “because of Israel’s rejection of Christ.”
God offered salvation to”Gentiles” (simply men – non-Jews) through the first 2500 plus years before the Mosaic covenant was even instituted and even before the final Word for the way of salvation came through His Son.
God could have left the Mosaic Covenant completely out of the salvation process, like He did for the first 2500 plus years of man’s history, and He would still have sent His Son as mediator to continue to save men.
More on the rest of Chap 11, if we (I) can get through this first portion.

I usually start threads against my better judgment because I do not write my posts quickly, as most of you seem to do, and with good answers too.
If I “shoot from the hip” on my answers, I usually regret it.

sonbeam