Not mentioned is the population's purpose and determination. The Gazans (et al.) have shown that they are willing and able to live under constant attack and to resist and return fire. (and make propaganda out of the injuries they take.) They hope that the Israelis are not, and will chose to emigrate rather than fight. Ultimately the question comes down to the determination of Israel's population to stay put even under constant rocket fire and attack. And it will come down to birth rate and the willingness of mothers to send their babies off to fight.
(-- And the willingness of outsiders to resupply their war-fighting ability.)