If I may say,
I think the issue of replacement theology is one where there's often misunderstanding because there's not a real understanding of how complicated Israel is - and how the Church (Jew and Gentile united together) are His Bride reaching out to Israel. The Church is not a replacement for Israel of old, but an unbroken continuation of Israel under the promised King and Messiah of Israel, and His Church is His Kingdom of Israel, expanded to include all the Gentile peoples of the earth. The Bible says:
For he is not a Jew, which is one outwardly; neither is that circumcision, which is outward in the flesh: But he is a Jew, which is one inwardly; and circumcision is that of the heart, in the spirit, and not in the letter; whose praise is not of men, but of God. (Romans 2:28, 29)
Counter to Replacement Theology, it is Biblical to note that there is still something particularly special about the modern day Jewish people, although the characteristics of that "specialness" are still under discussion among theologians. I do believe there's much merit for saying that the true Israel is not Israel "in the flesh" (i.e., ethnic Judaism) or even the Israeli State of today (as many Jews in Israel have noted for some time)...but rather Israel in the spirit. There is a constant theme in the Bible that the elder son will be replaced by the younger son as the true heir of God's promises. When Cain (the eldest) killed Abel, the legitimate descent from Adam was transferred to the descendents of the younger son. The same was true of Ishmael and Isaac, and Esau and Jacob. We also see it with the first kings of Israel where Saul and his son Jonathan were replaced by David and his descendents. And so it is not surprising that Jesus gave the keys of the Kingdom to Peter and the apostles (Mat 16:18), thereby giving the keys of the Old Covenant to the people who follow Yeshua (Israel of the New Covenant).
The New Israel are those who follow Jesus - and Jesus is God and He had the authority to do this. After the crucifixion, the curtain of the Jewish sanctuary was torn in two (Mk 15:37-39, Lk 23:44-46, Mt 27:51). At that point a transfer of authority happened and I believe that the fledgling Church became the New Israel. In that respect one could say that there are beliefs similar to Replacement Theology. However, there is a distinction between "Israel" and the "New Israel". Israel includes BOTH Christianity (New Israel), and it's older brother in the faith of Abraham (Jewish people yet to accept Christ). That is why we can say there is still something special and relevant about Judaism, our older brother in the faith. ...and note the fact that the Jewish people have not been forsaken.
People who espouse Replacement Theology in the full sense would not include Jewish people in the definition of Israel...and they'd say it's only those under the new Covenant, but it would be a mistake to not include the people of the promise (Jews) in our definition of Israel. The Church of Jesus Christ is not something separate from Israel, but is the true Israel --the true manifestation of the Chosen People (see Gal 6:16, 1 Peter 2:9-10, etc.). It is because of this that the Eastern Church is correct to refer to the saints of the Old Testament as "St. Abraham" and "St. Moses," etc. For, we are not a replacement for Israel of old, but an unbroken continuation of Israel under the promised King and Messiah of Israel, and His Church is His Kingdom of Israel, expanded to include all the Gentile peoples of the earth. And so, in Acts of the Apostles, when you have Jewish Christians addressing their fellow Jews who are not yet full Christians, you will see them refer to it as "the Way" -- that is, the true manifestation of Israel -- the "sect" that truly represents Israel, as opposed to the other Jewish sects (the Pharisees, Sadducees, Essenes, Zealots, etc.) who did not recognize the true King of Israel, Who is the only "Way" -- the "Way, the Truth, and the Life."
But, when Gentile Christians spoke of the Church, they stressed its truth and its universality; and this is why and how the terms "Orthodox" and "Catholic" were applied to the Church. And those two terms exist today.
Christ was present within the early Jewish community (alongside Gentile Churches where the Gospel was contexualized in their frameworks , Romans 16:3-5 ), as it pertains to the ecclesia/local bodies (Acts 8:1-3 , Acts 9:30-32, Acts 15:40-41, Acts 16:4-6, Romans 16:15-17, 1 Corinthians 7:16-18, 1 Corinthians 11:15-17 , 1 Corinthians 14:32-34 , 1 Corinthians 16:18-20, 2 Corinthians 8:17-19 , Galatians 1:1-3, 1 Thessalonians 2:13-15, Revelation 1:3-5 , Revelation 22:15-17, etc ) and the issue of where the Lord proclaimed how He would establish His Church upon the apostles ( Matthew 16:17-19, Matthew 18:16-18 )...and as it concerns Ethnic Israel (those who are unsaved), somehow it's gonna be the case that all of Israel will be saved by the Lord. It is perhaps the case that Romans 11 - when speaking of all Israel being saved - is meant to convey that something will happen with the generation of Jews prior to the MESIAH'S return where they all universally see the need to call on Yeshua - and thus, all become a part of the Remnant Israel/see salvation.
That is different, of course, than saying all in Israel are going to be saved all throughout history since many denied the Lord even as a part of Israel and the Lord made plain they were not of HIM...just as Paul noted in Romans 11 that not all in Israel are of Israel...but rather those who place their faith and trust in Him.
As
another wisely said best[/url]:
The olive tree represents remnant Israel, but does it also represent the Church? The olive tree is a group of Jews and Gentiles made holy by the Messiah. That is also an accurate description of the Church (Ephesians 3:6). With the olive tree metaphor, Paul was writing to Gentile believers (Romans 11:13), members of the Church. And yet, the context of the olive tree metaphor was not the Church per se. In Romans, Paul's first use of ekklesia comes in Chapter 16 (vv. 1, 5, 23), where it refers to local assemblies, not the entire body of believers. The context of the olive tree metaphor is remnant Israel (Romans 11:5, 7)--"their [Jewish people's] own olive tree" (11:24).
............Because the Church is remnant Israel, Paul--certainly a member of the Church--could say that since he was a believer in Jesus, he was part of remnant Israel (Romans 11:1-5). Because the Church is remnant Israel, Paul could say that Gentile believers in Jesus have been grafted into remnant Israel (Romans 11:17). Because the Church is remnant Israel, both Paul and Peter could say that Jews who didn't accept Jesus would be cut off from Israel (Romans 11:17; Acts 3:23). Because the Church is remnant Israel, Paul could say that Gentile believers are no longer "excluded from citizenship in Israel" and no longer "foreigners to the covenants of the promise" (Ephesians 2:12). Because the Church is remnant Israel, Paul could say that Gentile believers "are no longer foreigners and aliens, but fellow citizens with God's people and members of God's household" (Ephesians 2:19).
For more, one of the brightest minds on the issue are individuals such as
Roy H. Schoeman - author of the work "Salvation is from the Jews (John 4:22): The Role of Judaism in Salvation"and one of the best apologists on the issue of bringing Jewish people (physical descendants of Jacob/Israel) into the Church (New Israel)..as he was a former follower of Judaism and later converted and works extensively in the Church. Schoeman claims with justification that the end of history will be characterized by the conversion of the Jews. "St. Paul," he writes, "suggested in his Letter to the Romans that the last days will see the widespread conversion of the Jews. This has led many to consider the current wave of Jewish conversion and ask whether it might be the beginning of the fulfillment of that prophecy." Schoeman cites Romans 11:25 "until the full number of Gentiles come in, and so all Israel will be saved"