Roger Simon has a good post that expresses my views nicely, but I'd like to come at the question from another angle. See, it's like this...
Which means what, exactly? Ruthlessly murdering men, women, children and old people in calculated strikes? Committing to a goal of genocide and cleaning against Jews, regarding them as sub-human? Doing everything in their power to annihilate the Jewish state and its inhabitants?
As opposed to what would have happened if Israel had left Hamas and its leader alone, of course...
In which case Hamas would continue to ruthlessly murder men, women, children and old people in calculated strikes, remain committed to its long-standing goal of genocide and cleansing against sub-human Jews ("sons of apes and pigs"), and do everything in their power to annihilate the Jewish state and its inhabbitants.
Most Israelis seem to have come to a similar conclusion. In fact, they've pretty much had it.
Note for the 'peace' crowd: if you want peace in the Middle East, you'd better start considering Israeli sensibilities too. There can't be peace without the Palestinians... but there can't be peace without the Israelis either. And there can never be peace, of any meaningful sort, with people like this.
They wish to be martyrs? So be it. Oblige them.
UPDATE: Good follow-up analysis by Belmont Club: Transition.