Galatians and Israel

, …The Israel of God. (Galatians 6:16)

Who did Paul have in view in his benediction? After all the Galatians were comprised of both believing ethnic Jews and believing ethnic Gentiles.

The NLT says, “May God’s peace and mercy be upon all who live by this principle; they are the new people of God.”
The NIV says, “Peace and mercy to all who follow this rule—to the Israel of God.”
The ESV says, “And as for all who walk by this rule, peace and mercy be upon them, and [which can translate ‘even’] upon the Israel of God.”

It is clear from the context of Galatians that Paul is referring to the Galatian believers as “the Israel of God.” The term Israel can mean a number of things in the Bible: a definition (one who struggled with God), a man (Jacob), a nation, the Old Covenant community, a political entity or generally God’s people. Here it is in the last sense that Paul is using “Israel.”
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In fact, this is a great sub-theme of Galatians, especially, chs. 3–4. Contrary to the Judaizer’s false gospel, one doesn’t have to become Jewish (i.e. the Old Covenant community, which ethnic Israel had embodied) to be saved or be part of God’s family. God’s people are those who relate to God through faith in Christ/Gospel/NC. There is a newness in the NC. It is not merely a reforming of the OC. Christ had fulfilled the Old Covenant and ushered in the New Covenant governed by His 12 Apostles (think 12 tribes of Israel). We become Abraham’s offspring through faith (3:7) and there is no saving or meritorious distinction between “Jew and Gentile” (3:28), we are all “one in Christ Jesus.” Together we form God’s “new creation.” (Gal 6:15). Just as the word ‘church’ was used in the Greek Old Testament to speak of Israel (OC people of God) so today we can speak of Israel as referring to the Church (NC people God). From a NC perspective these are interchangeable words. Throughout Galatians Paul has been arguing that the Gospel produces a new multi-ethnic people of God who are justified by faith in the Messiah/Christ and live in accordance with the Law of Christ (moral law) by His Spirit. To enjoy the benefits of this Covenant one did not have to go backward in salvation history but forward. (Yet understandably transitions are not always the easiest to perceive when we are in the midst of them, Lk 5:3739, Acts 15).

This isn’t replacement or supersessionist theology but fulfilment and continuationist theology. Jesus was Jewish. The earliest New Covenant believers (until Acts 11:19) were Jewish. Though many Gentiles believed and joined Israel under the OC under the NC this became a fuller ingathering (c.f. Isa 49). Since Abraham/Moses there had always been a mixture of ethnic Jews and Gentiles in the OC community (Israel), because God’s plan of salvation had always been to redeem a people for Himself from every tribe and tongue and nation (Gen 12; classic view 1689.26.1). This he did progressively through Covenants, of which the New Covenant is most expansive.

What then of ethnic Israel? Paul addressed this in Romans 9–11 (Romans very much being an expansion of Galatians). You can see a brief visual depiction of this here. In short, the faithful remnant of ethnic Israel under the OC believed in the NC (the early Jewish believers, Acts 1–9). While some ethnic Jews presently believe many do not. Yet at the end of the age Paul envisions a great revival of ethnic Jews and their ingathering into the Body.