Good luck getting the Israelis to release the water necessary for successful agriculture.
I guess what this really comes down to is a more universal problem of people not trusting others who attack them enough to support their population health.
You have to have security to support hostile populations; e.g. if people were constantly escaping from prison and attacking you, you wouldn't continue to support the prisons that were allowing the escapes, would you?
I guess that just brings us back to the perennial problem of how to achieve peace where there is no hope for doing so.