Many believe today that we have substituted Israel in God's plan. That IS NOT TRUE! Abraham still has his covenant with God and it will be finished in the Last battle in Revelation. The church has a New Covenant,....a better Covenant. Jews are perfectly able to take part in this New Covenant, but are still covered by the Old Covenant.
The "Replacement Theory" is satanic. It's what caused the Holocaust. Genesis 12:3 is still in effect. The church will be taken out in the Rapture and the Jews will be left behind, but the Last battle will be over Israel and the Jews. As we see in Zech 12:9-10, the Jews will repent and be saved. Same in Zech 13:6. The church didn't become the substitute for Israel, but we are the Bride Jesus seeks. Israel is still God's people. IMO, the Jews that accept Christ and the Gentiles that accept Christ AFTER the Rapture are the ones that are beheaded by the Antichrist and are called "servants" in Revelation. The Bride are called the "Elders" in Revelation because they sing the song of redeemed. We were redeemed with the Blood of Christ. Friends know God's plan, servants just follow orders according to Jesus.
You are not a Jew unless you are of the bloodline of Judah. Period.