And "abandoned" seems...hm, that'd be one way to put it. Not the right one, but a one.
Whether you use the term “abandoned”, or “left”, or “forced out”, or “sold the land”, or “migrated from”, or “moved”, or “were expelled”, or ”were conquered and had to flee”, etc., it is irrelevant. We’re talking about people who left that land centuries ago. They lost all their property and moral rights to that land.
Invoking some scripture texts that they were there thousands of years ago gives them no legal/moral claim to that land.
Legally and morally the land belongs to the inhabitants. The current state of Israel displaced the inhabitants of the land through force, so they essentially stole the land.
You do you, they're the one with the unconquerable military & boom-booms that'll ensure they're there for eternity or there's no more "there".
If you invoke conquest and military force, that’s a totally different discussion. Yes, by means of force and conquest Israel is much stronger than the Palestinians, and they have no chance to take back their land through force. They are in the same situation native-Americans or Aboriginals in Australia were when they were invaded and conquered by European settlers (Who were much better armed and organized).
So on one hand we have the legality and morality of the issue, where the Palestinians are right, and on the other hand we have the military strength and imperialist way of thinking where the Israelis are right, because they are mightier.
With such an attitude in the XXI century, it is no wonder that most of the world is against the state of Israel.
On the other hand, Palestianians don’t have much goodwill either, because of their endorsement of terrorism and their association with the hard left.
The situation resembles the eastern front of WW2, when one side was made of imperialistic fascists and the other one by terroristic communists. Two evils fighting each other.