History is always a lesson: you get rid of one Hamas guy, another ten pop up. Thus, in the long run, more people from both sides die.... One thing to keep in mind: there was only one Saddam and one Hitler in existence, thankfully. As you have eloquently stated above, have they been gotten rid of initially, countless lives may have been saved. Your analogy above would have been valid if there was only one Hamas leader who is responsible for all the terrorism that innocent Israeli's suffer. That, however, is not reality. The reality is that there are two peoples at war. They have been at war for generations. Cyclical revenge killings have been going on since Israel's inception. Both sides--note that I said sides, not just Israel vs. one Hamas guy, or one palestinian group--feel that they have a right to the land. In the end, the solution, thus, is a political and not a military one. Unless you plan on targetted killing of every Palestinian, I seriously doubt that preemptively killing one Hamas guy will get anyone anywhere (and I say this both for the sake of Israeli's and Palestinians). And, as I have stated above, history is always a lesson: if you kill them, more will come, more (on both sides) will die....