As long as you accept that Israel was chosen but the Gentiles were grafted in later on.
The Gentiles that believe become the seed of Abraham.
Not, the seed of Abraham, Isaac, and Jacob.
Abraham was a gentile believer. Not as Israel.
It was through Jacob that such believers became Israel.
Jacob becomes Israel: Isaac's son, Jacob, wrestled with a divine being and was given the new name "Israel."
Being the spiritual seed of Abraham does not make a gentile into Israel!