Boy, am I already getting tired of hearing this. The basic claim is that since the thousands of rockets that Hamas has lobbed into southern Israel have caused relatively few death and injuries--just some deaths and injuries, along with massive panic, children living in bomb shelters, thousands of shock victims, etc.--Israel has no right to respond with overwhelming force.
What the Israeli government should do is offer anyone who thinks that having 1/4 million people living under constant fear of deadly rocket fire is acceptable, and should be accepted implicitly by the Israeli government, a plane ticket to Israel and free lodging in Sderot, the border town hardest hit by rockets from Gaza. Hell, I'll personally pay for Glenn Greewald's Sderot vacation.
UPDATE: BTW, I don't have a strong opinion on the wisdom of the Gaza operation. Despite the many strong opinions that one will see in the blogs on this issue, there are so many variables, and so much secret information that only government officials possess (including the real, as opposed to public, views of Egypt, Jordan, and the PA), that it would be rather foolish of me to express a strong viewpoint on whether the operation will achieve its objectives at a reasonable cost or not. But as with the 2006 Lebanon operation, arguing over its wisdom is a very different matter than arguing over whether Israel has the moral right to act to defend its civilian population from rocket attacks launched by terrorist entities.