Paul shows throughout his teaching that there are two groups within Israel: one faithful and true, the other unfaithful and merely professing. One is known as “the election” (or “the elect”) and the other as the “blinded” or ‘hardened ones’. One is a friend of God, the other is an enemy of His. God shows Himself bound to one, and strongly against the other. Sadly, Dispensationalists back the wrong Israel in their teachings. They choose natural Christ-rejecting apostate Israel, above the elect spiritual remnant in order to justify their false doctrine. In doing so, they miss the whole development of faithful Israel into the New Testament Church.
We see the whole dichotomy between true Israel and false Israel throughout Romans 9-11. Romans 11:7-10 corresponds, “What then? Israel hath not obtained that which he seeketh for; but the election hath obtained it, and the rest were blinded [Gr. poroo – hardened]. (According as it is written, God hath given them the spirit of slumber, eyes that they should not see, and ears that they should not hear, unto this day. And David saith, Let their table be made a snare, and a trap, and a stumbling block, and a recompence unto them. Let their eyes be darkened, that they may not see, and bow down their back alway.”