Why not? I never supported the war in Iraq from the get go I've always been against it.
I did and still do support the war in Afghanistan because it is part of the "real" war on terror. I was extremely pissed when Bush and co started pulling troops out of Afghan to put in Iraq and I predicted that Afghan would turn to crap because of it.
I don't need to say anything in hindsight with regards to Bush because I knew it and said it before hand.
As someone who has been involved in the WOT for eight years (four active duty, four as a DOD civilian) I can tell you that you don't know what you're talking about when you speak of the "real" war on terror. It is not just an Afghanistan thing, it's the entire region and yes, that includes Iraq. You can add Iran, Syria, Lebanon, the Arabian Penninsula, the 'stans, North Africa, the Horn of Africa, South America, etc., etc., etc. The war in Iraq has done more damage to al Qaida then most know or understand but then most people rely on the media and political pundits for their views. Things are not nearly as simple as 30-second soundbites make it sound.
We can all, with hindsight, declare what went right or wrong but then we didn't have to make the call when the results were not known. No war is mistake free, there are certainly things that can be debated; however, for Obama to refuse to acknowledge he was wrong is dishonest or blind. For those that claim that it wasn't the surge it was other factors, they are ignoring the enabler for these other factors. Sunni insurgents started to jump ship and come over to our side because we had already announced the surge and Sadr's Mahdi Army was beaten after the surge began. These guys knew they couldn't win and, after the surge was announced, knew they could no longer wait it out.
This is exactly why all these anti-war politicians are dispicable. Not because they oppose war but because their constant threats to pull funding and impeach Bush encouraged the enemy to continue to fight. This is also why the stupidist f##king thing you can do in a war is set a date for it to end. The enemy will just wait you out just as the North Vietnamese did when we announced we were withdrawing our troops from South Vietnam. I'll also remind you that GEN Petraus still says that the achievements of the surge are not set in concrete. My fear is that an Obama presidency will encourage yet another round of insurgency aided and abetted by an Iran with no reason to fear us. On a more historical note, North Vietnam admitted it was the anti-war crowd in the US and Europe that encouraged them to continue a fight they had already lost militarily in 1968. It's really pretty simple when you think about it.