God fulfilled his promises to Israel in Jesus Christ.
Before faith came, we were held in custody under law, confined for the faith that was to be revealed. Consequently, the law was our disciplinarian for Christ, that we might be justified by faith. But now that faith has come, we are no longer under a disciplinarian. For through faith you are all children of God in Christ Jesus. For all of you who were baptized into Christ have clothed yourselves with Christ. There is neither Jew nor Greek, there is neither slave nor free person, there is not male and female; for you are all one in Christ Jesus. And if you belong to Christ, then you are Abraham’s descendant, heirs according to the promise. (Galatians 3:23-29)There is only one covenant in Jesus Christ for both Jew and non-Jew.