I think part of the problem we can have with this is that the Scriptures say that Abraham's faith was "credited to him as righteousness." Since Christ had not yet come, from our human/temporal perspective he had not been "made righteous." Holy Spirit did not dwell in him. In our experience, he had not been justified.

I and the Father are One

It’s not regrettable salvation, it’s regrettable sin. The good news is that sorrow over that led to true repentance and that yielded salvation through the Lord Jesus Christ.

God has predestinated that all who are in Christ will be saved. He has not only included the chosen Hebrew people, but He has included the outcast Gentile people who had been without hope and without God in the world. This is the grand mystery.