I agree and I can see folks that believe it's a true doctrine have messed up grace and election beyond recognition.Spiritual Israel is a full blown DOCTRINE OF DEMONS!
Jacob/Israel (the nation in Rebekah's womb) is GOD's elect.
It was unmerited election, because Jacob/Israel was elected of GOD before he did anything.
His election was not based on anything Jacob ever did, but purely by GOD's say so.
That nation was physical and earthy.
Grace - unmerited favor (ie. not earned).
Most that deny that the BOC is a separate entity form GOD's elect Israel are the ones that cannot seem to fathom that GOD, who saves the BOC with grace, but for some reason don't believe GOD will do the same with His elect Israel and that they have to earn it.
Not to mention that is is specifically said that grace came to Gentiles through Israel's temporary fall.
The BOC was never in a fallen state and never will be.
It also says Israel will be restored.
The BOC is not ever restored, again because it was never fallen that it needed a restoration.
The BOC is a new creation, and has nothing to do with GOD's election of the nation of Israel nor it's future restoration.