Of course Israel has that right, Captain Obvious.
Israel is a sovereign country.
The West Bank is part of Israel (as is the Gaza Strip.
And it has nothing to do with any Psalm.
Q.E.D.
The point of the post was to show that the God of Israel, 3000 years ago through King David, showed that the land of Israel would be contested by the world. In Joel 3 and Zechariah 12, God says that He will bring the world into judgment for “dividing His land” that He gave to the sons of Jacob.