The West Bank and Gaza belong to Israel as much as America West of the Mississippi belongs to the United States.
Israel annexed that territory in War. It is their land. If Palestinians believe that in unfair, maybe they shouldn’t have tried to destroy Israel.
What’s the saying again? Don’t dish out what you yourself can’t handle?
If the United States was expanding today in the way that it did in the 19th century, I promise you that many people, American and elsewhere, would have a very big issue with it. Saying that other nations have also done the same thing, decades or centuries ago, is not at all an actual justification of the Israeli government's behavior on the basis on any merit.
Palestine started to war. They lost that war. A part of losing wars you started is... well, losing.
I must've missed the part where American expansion west of the Mississippi was entirely the result of other nations starting and losing wars with the United States.
Actually, the United States has a less valid claim to much of the land west of the Mississippi than Israel does to Palestine. The United States took much of that land by force from parties who did not purposely engage in any conflict with the United States. Meanwhile, Palestine voluntarily declared War on Israel, only to lose that war. It was largely their fault, and thus, I don’t consider Israel’s claim on Palestine invalid.