Read other letters about this article
But, that's neither here nor there.
Anyway, to respond to the 9/11 conspiracy theorists: Glenn does not have to ascribe to the point of view that BushCo. perpetrated 9/11 to be a credible source on the Administration's illegal activities, nor does he have to mention that there are people who dispute the official story re 9/11 in every post he writes which has to do with post-9/11 governance.
There are other issues, ones which are important. Ignoring them until it can be proved that 9/11 was, in fact, committed by the Administration (something that will likely never be proven, even on the remote possibility it's true) isn't going to get anyone anywhere.