According to Paul the ones who rejected Christ are not Israel any longer. It is only the faithful that are called Israel. Romans 9:6 Not as though the word of God hath taken none effect. For they are not all Israel, which are of Israel: 9:7 Neither, because they are the seed of Abraham, are they all children: but, In Isaac shall thy seed be called. 9:8 That is, They which are the children of the flesh, these are not the children of God: but the children of the promise are counted for the seed.