True Israel is the Church.

No one is abandoned.
If there are two separate peoples of God what did that mean for the early Jewish converts?
Abraham saved by the same faith that saves us today.
A true Jew defined, there is no way around this statement
No, a person is a Jew who is one inwardly; and circumcision is circumcision of the heart, by the Spirit, not by the written code. Such a person's praise is not from other people, but from God.
Romans 2:29
There is only one tree of faith, not two.
The Church is the continuation of the true spiritual Israel which has always been the individual people saved by faith.
The true Israel is and always has been
spiritual that is what the New testament makes abundantly clear.