There is NO mention ANYWHERE in the bible that God will terminate his covenant with Abraham, reject the Jews, and then make the gentile church the new Israel.
We are not called to be born again and then fly to heaven, but to live on earth and fully demonstrate the accurate word of the Lord before going to heaven to be with Christ.
Paul compared these who will arise in the last days to oppose the truth of God with the story of Moses and Jannes and Jambres. Paul said the same way Jannes and Jambres withstood Moses in the presence of Pharaoh, would be the same method that the diviners, sorcerers, and the psychics who will secretly introduce destructive teachings in the church will resist the truth. Paul called them men of corrupt minds, reprobate concerning the faith (2Timothy3:8).