People are figuring out that the teaching that the modern day Jews are God’s people makes God a promise breaker and Christ a failure.
Teaching that God no longer deals with true Israel also makes God a promise breaker and Christ a failure.
God and Christ told us who is true Israel.
As for me, this is my covenant with them, saith Yahweh; My spirit that is upon thee, and my words which I have put in thy mouth, shall not depart out of thy mouth, nor out of the mouth of thy seed, nor out of the mouth of thy seed’s seed, saith Yahweh, from henceforth and for ever. Isaiah 59:21.
There is only one people who have followed this verse and heard Christ’s voice and followed Him as He said they would. The bible defines its own terms. Here is the Greek meaning and verb tense for John 10:27.
“My [Israel] sheep hear my voice, and I know them, and they follow me [now and always].
The Anglo-Saxon, Germanic, Scandinavian, Celtic and kindred peoples have taken the Gospel to the world and formed many Christian nations as God promised true physical Israel would do.
Romans 11:2a “God hath not cast away his people which he foreknew.”
God also did not add a new people.