Faith in God was a very rare commodity in humankind. Abraham had no knowledge of the Seed or the role the Seed would play, only that God made a promise about a future crucial plan regarding it. He simply believed God and that, in itself, made him uniquely pleasing to Him, and makes Abraham a model of
our faith. Most others just paid God lip-service,
Matt 15:7-9 Is 29:13,
Ez 33:31. Remember that the Gentiles were grafted in by faith while the natural branches depended on the law (at best) (Rom 4 and 11).
Faith in God is a game-changer for man and that’s why it’s of such central importance in the new covenant. It reverses the alienation from Him that Adam initiated for man by an act of disobedience which was essentially and simultaneously an act of disbelief. Jesus reveals the true God fully, at the right time in history, so that the many might believe, now drawn by grace, into the
life of grace.
If a person sees Jesus and fails to believe in Him, that would constitute unbelief in God. But a person can have faith in God without having seen Jesus, even if a faith less fully informed, which nonetheless renders them just in His eyes. Rom 1, for example, speaks of a faith that should result simply by observing creation, so that none have excuse. So I’m good with the way they read: