Which brings an interesting point - the antiwar left, in a strange and curious way, may have actually helped the effort in that their squawking helped AQ believe that they could win in Iraq and ought send a lot of their leadership there - right into our jaws. Without the left, there is a real possibility that they might have stayed hidden and chosen some other battlefield better suited to their type of warfare ... or avoided open battle altogether staying strictly with covert terrorist operations.
Still, it has always bothered me that we made Iraq the bait - in a way, deliberately putting the Iraqi people in the crossfire. That was, for me, the troubling part of "fight them there or fight them here" - when "fighting them there" necessarily meant significant "collateral damage" to Iraqis who were not otherwise part of our fight with AQ.
It's something of a dilemma since their lives were at least as tortured under Saddam, and without hope of better future as long as he was in power. Does giving the people a path to a better future absolve our placing them in danger of as a path to that future? Perhaps the answer is that we merely replaced the danger while simultaneously providing a path out - likely the only path out and, fortuitously, one that was also to our benefit.
I think Bush's moral 'genius' was to add the path to a free Iraq as the critical element which made it all morally justifiable.
Which is why I doubt, had Gore won in 2000, we would be in the same place we are today. Probably Saddam would have had to be removed given that he would have reconstituted his WMD capabilities even if he didn't have them then. However, we would have done so without the simultaneously goal of truly rebuilding the nation into a free self governing people as Bush insisted upon from the start. And, without that, it would truly have turned into a quagmire and moral morass with all parties in armed opposition to us.