The land promise was an OT promise given to the tribes of the sons of Jacob (Israel), b/c of God’s promise to Abraham, to be a special people for God, & to occupy the land of Canaan. Canaan had been the land of the giants, an wicked idolatrous people. The Israelites were promised this land conditionally, as long as they obeyed God, and kept His statutes and laws. (Deut. 7, 20:17) God told the Israelites to sweep out, clean out, and destroy the peoples of the land of Canaan as they moved in, because the occupants of the land were wicked and evil, practicing idolatry, and child sacrifice. God did not want His people to interact with, intermarry with, nor imitate the unrighteous. The land promise to Israel was a simultaneous judgment upon the wicked nations occupying Canaan.
The Israelites disobeyed God almost from the beginning of their occupation of the lands of Canaan. Joshua records that they took statues of idols (unclean thing) from conquered cities, were fooled into making a treaty with some of the inhabitants, & did not entirely kill off some of the others. After some time, as recorded in the books of the OT, they intermarried & began to turn away from God, adopting idols and idol worship, and other evil practices such as child sacrifice.
They had promised to obey God, to enter into a covenant relationship with him. (Ex. 19:5-8.) Their disobedience & spiritual adultery (forsaking God, to follow after idols) was finally rewarded with a bill of divorcement from God. He put them away. (Isa. 50:1; Je 3:8; Ez. 36:17-19) The land promise had been fulfilled. He gave them everything He had promised, & nothing thereof that had been promised remained unfulfilled. (Josh. 21: 45) Due to the disobedience of the Israelites, the land promise is no more.
God maintained the land of Judah for the appearance of the promised Messiah, Yeshua (Jesus). Once Jesus had come in judgment, his 2nd appearance at the destruction of Jerusalem, the land promise was done. The city, the temple, and the wicked people who were persecuting His saints were destroyed. The land promise is not future; it is past.
The families claiming to be Jews who live there now have no true right or claim on that land, as the original property holders were forced off at gun point. It was stolen property, which makes the current inhabitants receivers of stolen property! The men who orchestrated the establishment of the State of Israel in 1948 had no right to do so. Imagine if they had taken over the occupied state of Baja, California. They had no right nor claim to the land they now call the State of Israel. Those actions were violently unlawful, immoral, and unethical.