Are gentile believers fellow citizens with the saints and members of the commonwealth of Israel? Who was grafted into the cultivated olive tree of Romans 11?

Paul wrote that a true Jew is one inwardly with a circumcised heart, and that circumcision is a matter of the heart, by the Spirit, and not by the letter? Is the inward Jew a member of the cultivated olive tree?

In the epistle to the Romans, Paul writes, “Not all who are descended from Israel are Israel.” Is the Israel that Paul is referring to, the cultivated olive tree?

In the epistle to the Ephesians, Paul writes about a mystery—that through the gospel the Gentiles are heirs together with Israel, members together of one body, and sharers together in the promise in Christ Jesus. Is this one body the cultivated olive tree?

Jesus said He has two folds and they will become one flock. Is the one flock of Jesus the cultivated olive tree?

Hebrews 11:39-40 informs us that the NT and OT saints are made perfect together.  Are these perfected, glorfied saints the cultivated olive tree?

Hebrews 12:23, in a vision, identifies an assembly of the firstborn who are enrolled in heaven, coming to Mount Zion and to the city of the living God, the heavenly Jerusalem, and to innumerable angels in festal gathering, and to God, the judge of all, and to the spirits of the righteous made perfect, and to Jesus, the mediator of a new covenant.  Is this assembly of the firstborn who are enrolled in heaven, the cultivated olive tree?  This prophetic vision meets fulfillment in Revelation 14:1-5, in the heavenly Mount Zion; the redeemed from mankind as firstfruits for God and the Lamb.  Cultivated olive tree?

Revelation 1:6 and 5:10 points to a group of people who Jesus Christ has redeemed by His blood, to be a kingdom and priests. Is this kingdom of priests, freed from sin by the blood of  Christ, the cultivated olive tree? Revelation 7:9 prophesies this same group, resurrected and raptured, glorified, and standing before the throne of God and the Lamb, from every nation, tribe, and tongue, wearing white robes and holding palm branches. Cultivated olive tree?

Is there a spiritual Israel?  What do you call the body of glorified saints who will rule and reign with Christ on earth?  Are the glorified saints members of the cultivated olive tree?

Is the cultivated olive tree the Israel of God?

In Isaiah 49 the Messiah is referred to as Israel.  Because Gentile believers are in the Messiah, Jesus, does that include them as members of the cultivated olive tree, the Israel of God?

Are the sons of Abraham the Israel of God?  Who are the sons of Abraham?

The sons of Abraham, counted righteous by faith, comprise the cultivated olive tree; they are Jew, and Gentile—the “Israel of God…”  All the saints in salvation history… The firstborn enrolled in heaven… The redeemed from mankind as firstfruits for God and the Lamb… The eternal covenant community of YHWH whose names are written in the Lamb’s book of life… The bride of Christ.

The saints of the Most High shall receive the kingdom and possess the kingdom forever, forever and ever.

Biblical ecclesiology leads to Biblical eschatology.