God’s kingdom isn’t divided into factions (Mk 3:24); it’s a holistic, integrated organism. (Jn 17:20) What comprises this kingdom? What does it look like?
We all start out with a bad father, children of the wicked one. (Ep 2:3) But when God quickens us, from being dead in our sin, becoming our sin and giving us His resurrection life (Ep 2:5), everything changes: we’re transformed and adopted into His family (Ep 1:5), such that we become part of Him (Ep 5:30), and He becomes part of us. (Jn 17:23)
To illustrate, God uses the grafting of an olive branch into an olive tree. (Ro 11:17) He cuts us off from our original trunk, makes a deep slit in the host tree to expose its vascular system, fixes us into this new host and stabilizes our connection until the two of us begin to grow into and out from each other, becoming one life together.
In this allegory, it’s easy to mistake the root, the olive tree that we’re grafted into, for Israel, God’s chosen people. Consequently, many think redeemed Gentiles should somehow emulate the Jewish people, and adopt Jewish language, traditions and rituals into their worship and obedience. However, God says Israelites are natural branches of the olive tree (Ro 11:24): Gentiles aren’t grafted into branches, but into the tree trunk. (Ro 11:18) If Jews are natural branches, they aren’t the tree.
So, what does the olive tree itself represent? God says Gentiles partake of the root and fatness of the olive tree, along with the Jews, the natural branches. (Ro 11:17) Christ Himself is the One we partake of (He 3:14); He’s the vine, we’re branches. (Jn 15:5) We’re not partakers of Israel, but of the divine nature (2Pe 1:4), partakers of the Holy Spirit. (He 6:4)
God’s kingdom doesn’t necessarily look Jewish, or eastern or western, or anything in particular. It’s distinctive is not in its likeness to any particular race or culture, but in it’s amazing cultural diversity, all blended within a single family, comprised of souls from every race and culture. (Re 5:9) The commonality lies in conformity to God’s law, which doesn’t prescribe or forbid any particular culture; it even protects culture by forbidding the imposition of extra-biblical tradition. (De 4:2)
Israel isn’t the divine nature, nor its wellspring; she is in fact, for the most part, entirely void of divine life (1Jn 5:12), and does not have a proper understanding of divine things (Ro 10:1); though beloved of God, she is still His enemy. (Ro 11:28) She does not honor the Son; she has persistently (Ro 10:21) and flagrantly dishonored Him (Jn 8:49), so her worship cannot glorify either the Father or the Son. (Jn 5:23) Only a remnant will ever know Him (Ro 9:27), so why emulate her ways, or pattern our worship after hers, especially in her liturgy? In teaching her tradition as God’s command, she’s corrupted her worship such that it’s largely empty and lifeless. (Mk 7:7) How can this, in itself, be pleasing to the Godhead? (Ps 2:12)
Salvation is of the Jews (Jn 4:22), in the sense that God’s revealing Himself and His salvation to the world through them (Re 21:12): the adoption, the covenants, the giving of the Torah, and the promises all pertain to them. (Ro 9:4-5) But it isn’t all just for them (Ro 9:17): there is one law for us all. In no sense do we become part of physical Israel in salvation, nor do we obtain salvation through them. We come to salvation just like Israelites always have (Jn 3:7), and we become part of God, just like they do. (2Co 6:17-18) There’s no difference between Jew and Greek here (Ro 10:12); in this, neither circumcision helps, nor uncircumcision, but a new creature. (Ga 6:15)
The Jews certainly have an advantage in that they’re custodians of God’s Word, so it’s embedded more deeply in their culture, and as a rule they’re much more familiar with it. (Ro 3:1-2) We can certainly learn much from them, and it’s not necessarily wrong to adopt parts of their tradition that aren’t inconsistent with God, but hoping this will bring us closer to God is a mistake: they’ve actually missed God Himself. (Mt 8:12) Supporting Israel and praying for her as God’s chosen nation (Ro 11:29), we must filter everything she says and does through the lens of Scripture, staying as true to the Word as we can.