Read Romans 10:1-4
What will happen to the Jewish people who believe in God but not in Christ? Since they believe in the same God, won’t they be saved? If that were true, Paul would not have worked so hard and sacrificed so much to teach them about Christ. Because Jesus is the most complete revelation of God, we cannot fully know God apart from Christ; and because God appointed Jesus to bring God and people together, we cannot come to God by another way. The Jews, like everyone else, must find salvation through Jesus Christ (John 14; Acts 4). Like Paul, we should pray that all Jews might be saved and lovingly share the Gospel with them.
Christ accomplished the whole purpose of the law in two ways: He fulfills the purpose and goal of the law (Matthew 5) in that He perfectly exemplified God’s desires on earth. But He is also the termination of the law because in comparison to Christ, the law is powerless to save.