Who is included in the Body of Christ?
Are these people included?...
Are the Apostles, the 70 disciples, the thousands of Jews who accepted Christ such as those at Pentecost, etc. Those Jews who have accepted Christ down through the ages? What of the 7,000 [a representative number out of the millions of Israelites alive when the prophet Elisha lived] Romans 11:3? What about other of God's peculiar people in the OT like Moses, Job, Daniel, David, Deborah, Noah...?
All those who believed the OT prophets such as the Isaiah 53 prophecy.
Those you are referring to belong to the little flock. They are the "True Israel", that Paul was referring to in Romans 9:6-7.
True Israel/Israel of God (Galatians 6:16) refers to the little flock out of the nation Israel that believe, those that are pastored by James the brother of Jesus, at the end of Acts.
They continue to stay zealous to the Law of Moses, even after they believed in Christ as their Messiah (Acts 21:18-25, James 2:24-26, 1 John 2:29, 1 John 3:7).
The rest of the nation Israel has fallen in disbelief (Acts 7:51, Romans 11:1-5)
As a result of the fall of the nation of Israel, salvation without the Law of Moses (Romans 4:5), is now open to everyone, Jew and gentiles, thru Paul's gospel of grace (Romans 11:11).
All Jews and gentiles who thus believe in Paul's gospel, found in 1 Cor 15:1-4, are now in the Body of Christ, where there is neither Jew nor gentile.
But the Body of Christ is not the same as the little flock. They are 2 separate groups of believers.