He conceded no such thing and you could not believe he did unless you are quite unfamiliar with Barry Farber and do not handle implications and inferences very well. He was saying that even if such things were so....
He is saying that the leftists cannot do a damned thing about their goals and beliefs if we don't win this war so they had better hope Bush wins the election.
I read the thing again, yes, he concedes that the Bush Administration lied about WMD's and that there was no Iraq-Al Qaeda connection. "To save time, let me concede...." I am unfamiliar with this, what is he? a columnist? Seems he is willing to give into leftist propaganda that can be easily disputed. Even though he, himself admits that he believes we were lied to about WMD's in Iraq and that there was no connection between Iraq and Al Qaeda, you steadfastly suggest he does not believe this. I'll believe what he says he believes over what you say he believes.