The Old Covenant was between God and a physical nation of people. If those people did God's will, then He would grant them physical, temporal blessings on Earth (but if "My Covenant they break"....). It never really had anything to do with any individual's salvation, which, from the beginning of time til now was always by faith alone.
Bingo!! Abraham was saved by his faithfulness to God. Not by having Abrahamic blood. How can one read the New Testament and miss this.
