The barrier is moveable. And 500,000 Jews would have been living on the other side of that barrier had it been placed on the Green Line. Not much protection for them, eh? And, what makes you claim that the land is "Palestinian" land? When did it ever belong to the Palestinians at any point in history?
Woman moderately wounded by firebomb thrown at her car in north J'lem (Haaretz)
from the article: Like a plane without a pilot