The thing is, I have to question where Dubya actually made an impact. Maybe I was raised on too many action movie thrillers, but I was under the impression our government had covert operations (read: assassinations we deny) for a very, VERY long time. Dubya DIDN'T help locate OBL, as far as I'm concerned, because as soon as you put the gun in his hands, he went all Yosemite Sam and shot up everyone BUT the bad guy. Meanwhile, Obama waited, listened, and as soon as Osama made a dumb move, he ordered the quick and efficient "move in and take care of business" move. We could have spared a LOT in deaths and PR mistakes had we just taken care of business from the start.
To quote Weird Al Yankovic's Yoda song, specifically the line "Remember if you kill him, then you'll be unemployed." Sure, a bunch of his policies that haven't changed lead to his capture, but most of his policies kept him ALIVE for 9 years. We were closing in, we almost had him, and then they decided
naaaawwwww! and they instead went on a "cover our butts" pet project... going after the VERY same dictator his FATHER put into power, only to attack his army (the army, not him) when they attacked an oil rich nation. All the while selling weapons to the VERY same side we helped Saddam into power to fight against. Hmmm....
Now, if GWB spent the entire time on the Afghan War, and got Bin Laden when the country and world had his support, no one would be having this conversation. But his pet project of Iraq, something he had since the 2000 debates, came first, the Afghan war was neglected, and we wound up throwing a bunch of money, time and human lives trying to give him a legacy. All when Saddam wasn't actually DOING anything.
Needless to say, Clinton tried going after these guys in the 90's, but all the SAME people on the SAME side that wanted these wars and wanted us to want these wars were prosecuting him for lying about boinking a chick (again, who WASN'T? It was like a key party in Congress at the time), and they were calling the potential war a "Wag the Dog" situation. We even ignored STRONG warnings that something was going to happen with them. Yeah, worth it.
Above all, killing him changes absolutely nothing... if anything, it makes the situation a little worse because apparently due to their mangled concept of Islam, it's okay for them to kill innocent babies, women, men, elderly, and everyone they can blow up in a building minding their own business (even of their own religion), but if you go after the spoiled rich brat kid poser that lead any of that, it's apparently wrong.
Seriously, WHY the heck did we go into the Middle East again? I mean, all the way back in 79? we should have just left them to their own devices... the terrorists would have blown each other up.