There is one final chapter that should be examined, the second “go to” portion of scripture usually used to defend the viewpoint of Israel being the olive tree: Ephesians 2.
Ephesians 2
Therefore remember that formerly you, the Gentiles in the flesh, who are called the “uncircumcision” by the so-called “circumcision” in the flesh by human hands, were at that time apart from Christ, alienated from the citizenship of Israel and strangers to the covenants of promise, without hope and without God in the world. But now in Christ Jesus you who were formerly far away have been brought near by the blood of Christ. vv.11 – 13