Halevy makes a very interesting point. Since we accept that no permanent resolution can occur and total non agreement is unsustainable, there's a middle ground, a wonderfully Machiavellian one of permanent interim agreement.
From news article:
It's quite brilliant, really. Create a permanent interim agreement where both sides can walk away claiming they've more or less won enough to fight another day, which they don't. I'm thinking of the Two Koreas. There's never been a peace treaty or bilateral agreement that the war is over or even that the 38th parallel is a border or that two countries legitimately exist.