Israel agreed to UNSCR 242, which linked withdrawal to a negotiated peace. The Arab League responded with the "Three NOs" of the Khartoum Accord: "NO recognition of Israel; NO negotiations with Israel; NO peace with Israel". Withdrawal was never supposed to be unilateral, but in exchange for something. That "something" has never been delivered. The equation is simple: no peace, no withdrawal. What's so hard to understand about that?
UN: Gaza could be 'uninhabitable' by 2020 if trends continue (AP)