What blocks some, as to the proper meaning of Romans 9-11 -- is their Eschatology. The Amillennial view will not except what you are saying. Simply because they have spiritualized the literal meanings of so many verses. They believe national Israel is done. Cast out permanently. The Apostle Paul of course, argued against this understanding because there are so many unfulfilled Prophetical statements in the Old Testament. That is why he said: Rom 11:29 For the gifts and the calling of God are not repented of. Again He said:
Rom 11:25 For I would not, brethren, have you ignorant of this mystery, lest ye be wise in your own conceits, that a hardening in part hath befallen Israel, until the fulness of the Gentiles be come in;
Rom 11:26 and so all Israel shall be saved: even as it is written, There shall come out of Zion the Deliverer; He shall turn away ungodliness from Jacob:
Rom 11:27 And this is my covenant unto them, When I shall take away their sins.
Thinking about OT Prophecies such as this:
Joel 2:28-32 And it shall come to pass afterward, that I will pour out my Spirit upon all flesh; and your sons and your daughters shall prophesy, your old men shall dream dreams, your young men shall see visions: and also upon the servants and upon the handmaids in those days will I pour out my Spirit. And I will show wonders in the heavens and in the earth: blood, and fire, and pillars of smoke.
The sun shall be turned into darkness, and the moon into blood, before the great and terrible day of Jehovah cometh. And it shall come to pass, that whosoever shall call on the name of Jehovah shall be delivered; for in mount Zion and in Jerusalem there shall be those that escape, as Jehovah hath said, and among the remnant those whom Jehovah doth call.