I want to state that while a military response in no way, morally, ethically, legally, has to proportionate. Israel, IMO, passed the point of morals on it's response.
I want to point out that Palestinians got what they voted for. Period. HAMAS was elected, and part of their appeal is that the Islamic Brotherhood wasn't violent enough.
As a matter of fact after the 2008 elections, HAMAS rounded up their I.B. competition and tied ropes around their necks, the other end to a truck bumper. I'll let you figure out the rest.
I'm not sure how you deal with that death culture mindset if you are Israel.