Could you please cite the first place where any real estate was called Israel? It is NO Christian invention that after Solomon, there was a 'civil war' and the 12 tribes became divided. The land was called Judah and Samaria. According to the Scripture the House of Judah and the House of Israel will not be rejoined until the return of Christ. Did not Isaiah live/write after Solomon?
Jeremiah pens that God divorced the House of Israel ... because of their whoredoms and 'spiritual' adultery... the punishment was that those children of the House of Israel would not even know who they were... That part has sure been fulfilled.
Furthermore, Moses named each individual tribe and what their future would hold, individually.
We’re talking here about the descendants of Jacob/Israel. All the Children of Israel are called God’s servant, as well as “My son, even My firstborn”. When land is spoken of, it is specified as land (’eretz’ in Hebrew).
So many Christians refuse to read and understand God’s overall plan to restore the Kingdom of Israel...the exact question the disciples asked Jesus/Yahshua as He was ascending...”When are you going to restore the Kingdom of Israel?” Christians also negate so many other Scriptures, such as “I came only for the House of Israel.” He said HOUSE not NATION...and what about “If ye be in Christ Jesus YOU ARE ABRAHAM’S SEED (sperm). I could give 100 more Scriptures to prove God’s plan centers around the final event when Yahshua returns is the restoration of the Kingdom of Israel. Oh, final thought. There are twelve gates in the new Jerusalem, each one with the name of a Tribe over it. There is NO CHURCH gate. Which gate are you going to go through?
Wikipedia has a fairly decent article on what the “real estate” of Israel was and is to be as promised to Abraham by God and to Isaac and finally to Jacob(whom God surnamed as ISRAEL).
https://en.wikipedia.org/wiki/Promised_Land