I used the Sadr-from-a-lamppost thing to illustrate that the people who say "if we only killed him things would get better" are not correct. Killing Zarqawi and Saddam didn't stop the terrorists/insurgents in Iraq. Even killing UBL won't end AQ (although I would do little dancing in the streets). The war against Islam is going to be long and end up brutal. Even after 9/11, we (America) weren't ready for it and still aren't. I cringe every time I hear our generals at a briefing pat themselves on the back for our pinpoint strikes with smart bombs that minimized casualties. You win a war like this like our parents/grandparents won WWII, by saying in effect "f*** ALL the Germans and ALL the Japanese". Hell, my parents still won't buy a Japanese car and it's been over 60 years.
al Qaeda and Hezbola and Hammas will NOT die out just by killing a leader here and there. There will ALWAYS be these madmen. What WILL keep the fanatic Islamics in abeyance, more or less, is when their coreligionst feel free enough to stand up against them; which they don't, right now.
Truth be told, we, America, have been fighting them, on and off, since the days of Thomas Jefferson.