If we were back where we started, I would suggest we have nothing to do with setting up a new nation and calling it Israel in the Middle East. I would have been just as concerned with the Jews as I would've been for the Maya, or the North American Natives. As it happened, we were never interested in restoring these people's homelands. I mean, how long does a land claim last? Apparently to the people who supported setting up Israel, a claim can last for more than a couple thousand years. Now I'm just hoping that the U.N. doesn't decide Ohio belongs back to the Native Americans, and draws a border for them right in my front yard. Except, I don't hate Native Americans, so we at least wouldn't be killing each other.
Except that the mix and history of the middle east is a lot more complex than that. Just as one example, colonial powers divided the area up into artificial states without regard to religion or ethnicity, because they could keep control of those things in a colonial era. just as they did in Africa. They had NO mandate to do so.
But the UN, and prior to that the league of nations to a lesser extent, as an international body actually does have a say in the foundation, boundaries, legitimacy and borders of states; and eventually managed a reasonable settlement in the balkans after tragic delays.
Yes, depending on "real politics" land claims might endure for a millenia.
The Irish question is unresolved after 4 centuries and the scottish claim to independence is still being resolved after about the same period of time. MAny countries went through 4 centuries or so of colonial "ownership" before establishing their independence, while others like canada australia and the united states of america, are basically now european countries who accomodate their indigenous peoples with differing degrees of success. Many south american countries are also now basically spanish or portuguese countries. My mother's family from france helped conquer england in 1066. Before that it had been largely occupied by angles and saxons.