Let me just add because I hate to be misunderstood: The Hamas militants that paraglided into the nova rave and rounded up and killed many of those kids... I think that was a mass murder of innocent people (and also by IDF attack helicopters killing everybody in sight was also mass murder). I didn't see that as legit at all, either side, and those Hamas militants did Palestine a huge disservice and deserve the death penalty. And if anybody was raped, they do deserve the death penalty (although there didn't seem to be evidence that it happened). Of course it goes without saying that G'Vir, Gallant and Netanyahu deserve the death penalty.
I'm against the death penalty in practice though because I don't trust governments to correctly administer justice.