After reading too many pages of people going back and forth over what is "proportional" and whatnot I have a single thing to say about this entire thing, and not about that ugly diaper called Helen Thomas.
We have NOT A CLUE what it is like to live under a never-ending possibility of being killed by an unguided rocket. We walk outside and complain if the wind is blowing too hard. We live such a cushy lifestyle in America we forget what kind of hell Israel deals with on a daily basis.
Its the same idea as a school kid being picked on day in and day out. One day he lashes out and shoots up the school. Did he respond proportionally? No. Was his actions justified based on the constant crap he got from his peers? That's up for individual interpretation.
I would support Israel publicly saying that for every rocket fired into Israel 10 2000lb bombs would be dropped on the Gaza strip. That way you leave it up to the Palestinians, not the Israelis, whether or not gaza gets decimated. That way they only have themselves to blame. Proportionality is irrelevant, rockets fired on civilians is an act of war, so responding with an act of war is perfectly proportional.