When we enter into a Covenant with Jesus, we identify ourselves with Him; and then it does not matter what our nationality, social position, or sex is: in Christ we are equal. By identifying with Christ, we become the seed (descendants) of Abraham, and we inherit all the promises made to Abraham and his seed.
First, this position and belief violate Scripture. When God made the Abrahamic Covenant, the Scripture says it is between God, Abraham, and his seed (descendants.) This covenant is closed for one because it received the signature of circumcision. Signed, sealed, awaiting full delivery.
Second, if God wanted Gentiles in this covenant, they would have been mentioned in the covenant itself in Genesis where the covenant is described.
Third, the Abrahamic Covenant says Abraham and his descendants will be given the land of Canaan which encompasses a greater area of possession. Your position that Gentiles are in the Abrahamic Covenant "through Christ" necessitates Gentiles will also be given the Promised Land to share with the Jews. However, Zechariah states that when the time comes for the Jews to possess their Promised Land that God is going to cleanse the Promised Land of all Gentile presence. Your belief contradicts Scripture.
Fourth, to be in the Abrahamic Covenant God demands Abraham and his descendants (seed) circumcise their flesh and if one does not, they themselves are to be "cut off" from the covenant and the people of the covenant. Have you obeyed what God demands and been circumcised?
Fifth, Since you claim to be in the Abrahamic Covenant which of the twelve tribes do you belong?
I'm pretty sure you are basing your belief that by being in Christ you are automatically now included in the Abrahamic Covenant on Saul's words in Galatian letter chapter 3. Well, I think you've misunderstood what Saul was saying and WHO he was saying it to. So, let's take his letter and come to the knowledge of the truth:
First, let me say that Saul, a Jewish Christian, and a true son of Abraham (being in Christ now according to your erroneous belief would make him TWICE in the Abrahamic Covenant), is writing to Jewish Christians in the Galatian region, NOT to Gentiles. He may mention Gentiles but when he does it must be discerned which Gentile? There were three Gentile groups mentioned in Scripture: Gentile proselytes, God-Fearers, and what I call hard-core, uncircumcised, non-covenant idol-worshiping Roman, Scythian, or Barbarian Gentiles.
Identifying WHO Saul may be referring to is key to understanding his words. But here's the portion of Saul's words upon which Gentile church teaches this error: I will bring out key words to help understand what Saul is saying and TO WHOM he is writing to in the first place. Saul is writing to Jewish Christians:
23 But before faith came,
we [Jews]
were kept under the law, shut up unto the faith which should afterwards be revealed.
24 Wherefore the law was
our [Jews} schoolmaster to bring
us [Jews] unto Christ, that
we [Jews] might be justified by faith.
25 But after that faith is come,
we [Jews] are no longer under a schoolmaster.
26 For
ye [Jews] are
all [Jews] the children of God by faith in Christ Jesus.
27 For as many of
you [Jews] as have been baptized into Christ have put on Christ.
28 There is neither Jew nor Greek, there is neither bond nor free, there is neither male nor female: for
ye [Jews] are all one in Christ Jesus.
29 And if
ye [Jews] be Christ’s, then are
ye [Jews] Abraham’s seed,
and heirs according to the promise. Gal. 3:21–29.
The Hebrew nation since the Feast of Harvest (Pentecost) had entered the New Covenant era based upon the New Covenant God made with the House of Israel prophesied by Jeremiah in 31:31-34. Take note that in this covenant no Gentiles are included because no Gentiles are mentioned as part of ANY Hebrew covenant. These Jewish men (Matthew, Luke, Mark, John, James, Peter, Saul, and the others) are smack dab in the middle of this "new thing" God was doing in the earth and it didn't come with instructions. Well, it did. the instructions are found in the Hebrew Scriptures of Law, Psalms, and Prophets. In other words, one MUST "search the Scriptures" to understand this New Covenant and what God was doing to and among the Jews.
Jewish Christians that became Jewish Christians through the new birth by the Holy Spirit of Promise were rightly concerned about their standing in the Abrahamic Covenant which Saul addresses perfectly.
First, Gentiles were NEVER "heirs" to the Abrahamic Covenant.
Second, Saul is addressing these Jewish Christian concerns in his Galatian letter as I point out above.
Third, in verse 29 Saul is not making a new covenant here. Saul does not make covenants for God and Christ. God makes His own covenants, and He is NOT making one here.
It is clear from the text in Galatians 3 that Saul is addressing Jews who have become Christians and were worried about their standing in the Abrahamic Covenant. Saul tells them:
"if
ye [Jews] be Christ’s, then are
ye [Jews] Abraham’s seed,
and heirs according to the promise."
So, these passages clearly show Saul is addressing Jews and not Gentiles and the teaching that Gentiles are in the Abrahamic Covenant is untrue.
God is not through with Israel yet, despite the nation as a whole choosing not to believe in Jesus.
None of the covenants does God require faith. By virtue of the Hebrew people from Abraham down through to his descendants, the children of Jacob/Israel, being in covenant is self-contained salvation for all Israel. In Acts 2 it says 3000 Jews were born again and the beginning of Christ building His Church. And for four decades until the destruction of the Second Jewish Temple that's exactly what Christ did. Choice is unnecessary in the Jewish covenants. God will keep His promises even though Israel doesn't because the nature and purpose of the covenants is the Redemption of those God has chosen to save.
He provides a thorough-going answer to the question, “Has God rejected His people, Israel?” That answer is a firm, “Absolutely not,” and he provides multiple points of evidence.
I hope you take what I clearly brought out from Saul's letter to Jewish Christians, specifically, chapter 3.
ALL the writings from Matthew to Revelation are written to Jews. Gentiles might be mentions, but then one must identify which Gentiles are being spoken of: Proselytes, God-Fearers, or uncircumcised idol-worshiping Romans, Scythians, Greeks, etc.?
It's a good thing to read your overall position towards God's Chosen people Israel.
When we realize, God has promises to fulfill towards Israel that are still yet future then such person is near to the kingdom of God.