I'm interpreting the OT the same way the apostles interpreted it. It all points to Christ, not physical Israel. You are the one who seems to have a view that is not supported by Jesus and the apostles.
"For the promise that he would be the heir of the world was not to Abraham or to his seed through the law, but through the righteousness of faith." (Rom. 4:13)
"By faith Abraham obeyed when he was called to go out to the place which he would receive as an inheritance. And he went out, not knowing where he was going. By faith he dwelt in the land of promise as in a foreign country, dwelling in tents with Isaac and Jacob, the heirs with him of the same promise; for he waited for the city which has foundations, whose builder and maker is God." (Heb. 11:8-10)
"For those who say such things declare plainly that they seek a homeland. And truly if they had called to mind that country from which they had come out, they would have had opportunity to return. But now they desire a better, that is, a heavenly country. Therefore God is not ashamed to be called their God, for He has prepared a city for them." (Heb. 11:14-16)
"But you have come to Mount Zion and to the city of the living God, the heavenly Jerusalem, to an innumerable company of angels, to the general assembly and church of the firstborn who are registered in heaven, to God the Judge of all, to the spirits of just men made perfect, to Jesus the Mediator of the new covenant, and to the blood of sprinkling that speaks better things than that of Abel." (Heb. 12:22-24)
The NT puts all the OT land promises into proper perspective. It's not about physical Israel. It's about Christ.
What do you make of Romans, Chapter 11 then? It is all about the children of Israel, not "spiritualized" Israel.