The Palestinians who presently occupy Israel and the West Bank, and many of those in Gaza are the descendants of Philistines, Egyptians, Greeks, Romans, Hittites, Assyrians, Babylonians, Medes, Persians, Hebrews of all 12 tribes as well as early Christians, and European Crusaders as well as Turks. They have lived there since forever, converting to whatever religion was in fashion.
There were only a few Jews left after the Romans defeated the Bar Kochkba rebellion in 135 CE. The Zionist movement did not start until 1897, and was slow in populating the area. Most settlement dates from the 1930's.
The point is that all these people are related, and none has a better claim that any other. The idea that God grants real estate is quaint and inaccurate, as one could just as easily say that the Hebrews/Judeans p!ssed off God and He sent the Romans to remove them. The Bible is filled with such divine condemnations.