correct version

Jim writes: and then Israel would withdraw back behind the pre-six day war boundaries and they'd all live happily ever after.

I see your sentence is ironical, but as for the pre-six day war boundaries, don't forget Israel was within its pre-six day war boundaries in 1967, when it got attacked by Egypt, Syria and Jordan, and Israel was within its 1947 boundaries, the ones decided by the UN, when it got attacked (in 1948) by Egypt, Syria, Lebanon and Iraq.