It's from a void of knowledge of the ontological Gospel. There's no extant land promise for a boundaried parcel of earthly real estate. The resurrected, glorified, and ascended prosopon of Christ IS the Promised Land. His human flesh was of the dust of the ground, and that's the robe He gives us in exchange for having taken ours. Jesus Christ is Israel; not the nationality or the Church. But both are Israel when any, by faith, put on the prosopon of Christ. There's no Jew nor Greek in Christ, so there aren't two covenants. And that means we're in the kingdom now, awaiting only His glorious bodily second coming. No rapture, no post-rapture millennial reign, no "third" coming. Just the Second Advent and then the new heavens and new earth.