Let's look at what Supersessionism is, and what it means for Israel.
Supersessionism is the idea that physical Israel is no longer Israel; that the Church is now Israel.
- God is done with them, they are abandoned.
- The Jews are now cursed as a people.
- They no longer have any promises -- all their promises are now promises of the Church.
The idea is misleading. The Church does not replace Israel. Certainly, the New Covenant replaces the Mosaic Covenant. But the salvation of Jesus Christ is not a replacement of Israel. Instead it is a replacement of all mankind. He is the second Adam which is no longer a living soul but a quickening spirit. The word, "church", carries the connotation of an organization today, when the word comes from the German word, "
kirk," which means "house." The house of God has never been brick and mortar buildings, but with Christ, the human body. Israel was never the house of God. The Holy Spirit came upon Israelis temporarily, but never resided permanently. One might argue, that John the Baptist was the one exception in the Old Testament (the Gospels, while in the New Testament, are old testament narratives until the resurrection of Christ.).
Christianity with the new birth is a new humanity and no one, Jew nor Gentile, participates in this new humanity without accepting Christ as their Lord and Savior. To argue that Jews have salvation through the Old Testament is to hate the Jewish people. For that argument condemns all to everlasting damnation. The Jews and Gentiles who love the Jewish people are those who help evangelize them to Christ. Support such organizations such as Jews for Jesus. These people love the Jewish people.
The idea of replacement theology as many understand today is misleading. The real replacement is of mankind, not any tribe or cultural group. There is new culture that is the eternal culture of the Kingdom of God that replaces the old culture of humanity. Will Israel get saved? Yes, when they see Jesus in his second coming, "and they shall look upon me whom they have pierced, and they shall mourn for him, as one mourneth for his only son, and shall be in bitterness for him, as one that is in bitterness for his firstborn." (Zech. 12:10).