What price war?

Recently, I mentioned 'ulterior motives' as one of the arguments against war. Unfortunately, it reinforces the idea that opposing this war is a left-wing knee-jerk reaction.
This war is objectively a bad thing. I invite those who support it to step back from their viewpoint, and to consider where this war is going. 120,000 additional troops. $75 billion is being allocated. No-one knows what the aftermath is, or how long it will last. America is discredited in the international community. Arabians who fled Saddam are returning to Iraq to fight the coalition.
Ask yourself: is all this really worth it?