Galatians 3:29
And if you belong to Christ, then you are Abraham’s descendants, heirs according to promise.
Saul was writing to Jews who were "under the Law" and "under a schoolmaster" (the Law.)
Stop taking things Hebrew and making them Gentile. You end up with false doctrine and understanding.
Pointing BACK TO:
Genesis 17:19
19 Then God said: “No, Sarah your wife shall bear you a son, and you shall call his name Isaac; I will establish My covenant with him for an everlasting covenant, and with his descendants after him.
We as Gentiles Christians are spiritual heirs to God’s promises to Abraham.
You quote the Scripture then you reject it. God says above, "I will establish my covenant with him (Isaac) for an everlasting covenant AND WITH HIS DESCENDANTS after him."
What part of "HIS DESCENDANTS" do you not understand. The covenant is biological. Natural Olive tree Israel became spiritual Olive tree Israel when the Holy Spirit baptized three thousand Jews into the body of Christ on the day of the Jewish Feast of Harvest recorded in Acts 2.
In Romans 11
We are grafted onto the Israel of God as wild (non-Jew Branches). The broken off natural branches are grafted BACK ON to the Israel of God.
The Israel of God are His People, His olive tree.
Nowhere in the Old Testament does God call Gentiles "Olive tree." Israel is the Olive tree. And like it says in Jeremiah the branches that were broken off for disobedience were grafted back in. Nothing in Jeremiah's words even remotely refer to Gentiles. You are adding to the Bible.
Jeremiah 11:16
The LORD called thy name, A green olive tree, fair, and of goodly fruit: with the noise of a great tumult he hath kindled fire upon it, and the branches of it are broken.
16 The LORD called thy name, A green olive tree, fair, and of goodly fruit: with the noise of a great tumult he hath kindled fire upon it, and the branches of it are broken.
17 For the LORD of hosts, that planted thee, hath pronounced evil against thee, for the evil
of the house of Israel and of the house of Judah, which they have done against themselves to provoke me to anger in offering incense unto Baal. Jeremiah 11:16–17.
Jeremiah is speaking to Jews of both the House of Israel and the House of Judah. So, which tribe do you belong? The ten northern kingdom tribes of Israel or the two southern kingdom tribes of Judah?
Which tribe were you born into?