Argument: Israel is legitimate in using full force to win war on Hamas
"In defense of Israel's 'disproportionate' response in Gaza". Christian Science Monitor. January 8, 2009 - The notion of "proportional" response lacks both merit and logical support for several reasons. In war, there are winners and losers, and the only palatable means of victory come from a disproportionate use of force. Victors are inherently more skilled in combat, tactics, and in the effective deployment of (generally superior) technology.
It does not make sense to demand one technologically or militarily superior belligerent to refrain from fighting to their full potential, simply because they are able to enact "disproportionate" damage on a weaker foe.
Should the United States have refrained from using the atomic bomb because Japan did not yet possess one? Would it have been better to extend Lend-Lease to Nazi Germany as well as Britain so that neither side would gain the advantage? Simply put, a militarily superior force should not limit itself due to the international community's desire to root for the underdog.