The Western leftists and many Israeli Arabs are sick with the same malaise. They both, actively or passively, support forces that would remove their liberty and the rights they take for granted.
In the case of Israeli Arabs, hypocrisy is overwhelming. Same people vehemently oppose Avigdor Lieberman’s proposal of the population and territory exchange because they don’t want to be ruled (very understandably) by the PA or Hamas thugs AND support, demonstrate and agitate in favor of the Hamas and PA thugs. Only pathology of the Western media can let that malaise continue unexposed, and instead criticize Lieberman who is forcing the moment of truth.
Nothing to prevent them from moving. That's what everyone will expect from Jews in the West Bank. Personally, I don't think the US should support any agreement requiring depopulation. If Jews in the West Bank want to stay there under palestinian rule, there were a few in Gaza, that should be permitted, and we should demand the government protect them and their rights. America shouldn't be advocating apartheid.