If you were correct about the land promise to Israel, the passage below would not be in the Bible.
Heb 11:13 These all died in faith, not having received the promises, but having seen them afar off, and were persuaded of them, and embraced them, and confessed that they were strangers and pilgrims on the earth.
Heb 11:14 For they that say such things declare plainly that they seek a country.
Heb 11:15 And truly, if they had been mindful of that country from whence they came out, they might have had opportunity to have returned.
Heb 11:16 But now they desire a better country, that is, an heavenly: wherefore God is not ashamed to be called their God: for he hath prepared for them a city.
Paul does not try to disconnect faithful Israel from the Church, in the passage below.
Rom 11:1 I say then, Hath God cast away his people? God forbid. For I also am an Israelite, of the seed of Abraham, of the tribe of Benjamin.
Rom 11:2 God hath not cast away his people which he foreknew. Wot ye not what the scripture saith of Elias? how he maketh intercession to God against Israel, saying,
Rom 11:3 Lord, they have killed thy prophets, and digged down thine altars; and I am left alone, and they seek my life.
Rom 11:4 But what saith the answer of God unto him? I have reserved to myself seven thousand men, who have not bowed the knee to the image of Baal.
Rom 11:5 Even so then at this present time also there is a remnant according to the election of grace.
James did not try to disconnect faithful Israel from the Church in the passage below.
Jas 1:1 James, a servant of God and of the Lord Jesus Christ, to the twelve tribes which are scattered abroad, greeting.
Jas 1:2 My brethren, count it all joy when ye fall into divers temptations;
Jas 1:3 Knowing this, that the trying of your faith worketh patience.
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the Jews certainly did miss out on the promises in that day. there are hundreds of promises remaining to be fulfilled. Ezekiel 36-38 Isaiah 61 many many more show the same nation who missed out and were scattered do indeed receive the promises. Where it is was said you are not my people you shall be called sons of the living God.
This is accomplished at the 2nd coming when the LORD comes and delivers Israel this is described in Dan 7, Zech 14 and Rev. all of them have this deliverance at the 2nd coming and from that time on life continues and Israel is given the new heart promised in many other places.