The Israelis owned more deeded land than anyone else in Israel in and before 1948. The others refused to accept their own land, because they wanted it all, even the majority of property they did not own. There was a short war in 1948, and the Israelis won.
Throughout ancient and modern times, every nation that currently exists, exists on account of a predator nation entering the nation/tribal grounds and sugjugating or brutally decimating the population and expropriating all lands to their ownership.
All of a sudden Israel and only Israel must give up her land she took due to butt-dragging of their opponents when everyone pointing fingers rests on a society that at one time or another engaged in bitter disputes over their lands they conquered and "civilized."
That dog just doesn't hunt.
Actually, Israel should give up that land because inevitably, they are going to have to anyway. Giving back the Occuppied Territories will probably buy them a few decades of peace before their grandchildren all move back to Europe where they came from.
Inevitably, though, Israel won't last. Just like the Crusader States didn't last.