Jordan wasn’t in mandatory Palestine for very long, and before that modern Palestine and Jordan weren’t administered under the same units in the Ottoman Empire. In the Ottoman Empire Palestine was split up between different administrative units centered in modern Israel/palestine and also Lebanon
Yeah but that be like hitler taking over Czechoslovakia bc there’s German population there I don’t think many people would see that as legitimate. Jordan actually occupied the West Bank for period of time, I think the PA doesn’t have a military force and they are the closest to Jordan but there would be no way for them to invade bc the border is controlled by Israel.
There isn’t a unified Palestine there the PA in the West Bank and Hamas in Gaza then there’s a bunch of Palestinian refugees that are all over the region and have been in there host countries for some time. I think Palestinian have no real chance of taking over an Arab country, mostly because they don’t border one other than Egypt. That and if they even attempted they would quickly alienate themselves and lose a lot of legitimacy.