The word "church" does not appear in Scripture's or my description of "all Israel".
The word "Israelite" does not appear in Scripture's or my description of "all Israel".
Who then is included in "all Israel"?
Romans 9:6-8
All Israel:
Not
of Israel
Not the children of the flesh
The children of God
The children of the promise
Counted for the seed
Galatians 3:16,28-29.
You are leaving out a word that makes all the difference. That is the word "not," "ου" in the Greek. The true meaning of the last clause of Romans 9:29, which in Greek reads, "ου γαρ παντεϛ οι εξ ισραηλ ουτοι ισραηλ ," and translates literally as, "not for all the of Israel these Israel," is given by numerous translators as:
NASB:
For they are not all Israel who are
descended from Israel;
ISV:
For not all Israelites truly belong to Israel,
ESV:
For not all who are descended from Israel belong to Israel,
CSV:
After all, not all of the people of Israel are the true people of God.
and DARBY:
for not all [are] Israel which [are] of Israel;
So the INTEERPRETATION you CHOOSE to impose on this clause is contrary to the mature judgment of MANY highly reputed scholars of the Greek language.
But this is not JUST the opinions of numerous respected scholars. For the Holy Spirit himself, in speaking through Paul, explained this rather obscure Greek statement in the following seven verses by giving an example of two physical descendants of Abraham, only one of which was the chosen "seed." Then, for the rest of the chapter, God defends His RIGHT to make such choices. But in the entire discussion, He never even suggests that the chosen "seed" could be someone who was not also a physical "seed of Abraham."
THAT interpretation, for that is ALL it is. For it is NEVER actually STATED in scripture, and you get it from a different discussion, which you also wrest.
