This unilaterally changes the diplomatic situation regarding Israel's occupation of the West Bank and liklihood of a successful outcome from direct talks. In the past Israel simply refused to honor it's agreements like the Road Map. Now Israel has intentionally eliminated it's sovereign capacity to honor any agreement relating to land concession. It would be equivalent to Abbas announcing there must be a Palestinian referendum on giving up the right of return or ending the conflict. It is not much different than Abbas going to the UN to unilaterally declare a state. Thus Israel does what it forbids Abbas to do. Obviously neither side can negotiate if the power to guarantee agreements is removed. Obama must now act since Israel has FORCED his hand. The proper venue now is the United Nations Security Council, and NATO is the agent of enforcement.
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from the article: Knesset mandates referendum to withdraw from annexed land