God promised it to them in the Bible. The issue is settled FOR-EV-ER! He also said that Israel's own brother would be a wild ass of a man in the land, bloodthirsty and against everyone.
Isreal whined about it. ? 🤣 Imagine you own a home, and some bigots run you out of town, but you fight to get it back, and after a long long battle you're finally ALLOWED to return, but when you do you find squatters living in your rightful home and claiming it's theirs. Instead of kicking them out however, you offer to live with with them, but they promptly piss on you and say: from the river to the sea, from you I will be fee. Imagine the hypocrisy of a non people wanting land that was NEVER theirs.