^ Good scriptural response by minasoliman.
Correct me if I am wrong, but the phrase "new Israel" doesn't occur in the NT as far as I know. The phrase "Israel of God", however, does. This is important, because from how I understand it, the Orthodox teaching is that there has been, is, and will be, only one Israel. The Church did not 'replace' ethnic Israel as the covenant people. There is only one covenant people: those who believe in Christ Jesus, both in the Old Testament and the New. But many "native branches" of ethnic Israel were cut off, while many "wild branches" of Gentiles were grafted on to the one tree, the Israel of God. Christ as Israel. Something like that.