Of course I said no such thing. I wonder if you even read carefully what I have written carefully.
Here is the critical verse which will illustrate just who the Israel of God is:
For they are not all Israel which are of Israel. (Romans 9:6b)
Paul references "all Israel" and "Israel". These are two different entities. Just what is their relationship? (In lieu of some of Venn diagrams.) I believe it is one of the following: either (1) physical Israel entirely contained within "all Israel"; or (2) physical Israel partially contained within "all Israel."
Paul explains:
Neither, because they are the seed of Abraham, are they all children: but in Isaac shall thy seed be called. That is, they which are the children of the flesh, these are not the children of God: but the children of the promise are counted for the seed." (Romans 9:7,8)
We discover (in Galatians 3:29) that if we are Christ's, then we are Abraham's seed and heirs according to the promise. So, it is (2) above. Thus, "all Israel" consists of a saved believing remnant of physical Israel (Romans 11:5) and another group. This must be believing Gentiles. The operative word here is "believing."
And that he might reconcile both unto God in one body by the cross, having slain the enmity thereby: And came and preached peace to you which were far off (gentiles), and to them that were nigh (Jews). For through him we both have access by one Spirit unto the Father. (Ephesians 2:16-18)
I'll leave you with this Bible warning:
Beware of dogs, beware of evil workers, beware of the concision. For we are the circumcision, which worship God in the spirit, and rejoice in Christ Jesus, and have no confidence in the flesh. (Philippians 3:2,3)
This was written to the church at Philippi in Macedonia who were gentile believers. We are "the circumcision" which worship God in the spirit and rejoice in Christ Jesus and have not confidence in the flesh.
So are the promises which God made to His covenant nation Israel, a few of which have been repeatedly posted on this thread, cancelled?