It would be if it wasn't for Jesus Christ, but then being a Christian wouldn't make any sense at all.
From a Christian point of view – see Romans 11:11-31 – the Jews/Israel is seen as the cultivated olive tree, and all Christian Gentiles – i.e. all Christians that are not Jewish – are seen as "a wild olive tree, and grafted, contrary to nature, into a cultivated olive tree" i.e. the Jewish/Israeli tree (Romans 11:24). So as a Christian Gentile you therefore take part in God's words and promises to the Jews/Israel as a grafted olive tree.
But Jesus Christ brought something completely new to the table. He say about Himself that He came to fullfil the Law and the Prophets of the Old Testament (Matthew 5:17-20). He also said: “I am the way and the truth and the life. No one comes to the Father except through me" (John 14:6).
In this way Christianity is not Judaism stripped for export, Jesus Christ is the culmination of all that was said in the Law and by the Prophets.
