Here's a little
linky link to some details of Rosie's View yakkin' about KSM. For balance,
here's a site with a somewhat less "anti-Rosie" spin.
This one just straight up calls her out (no surprise given the words "Exposing and Combating Liberal Media Bias" on Newsbusters' page).
To summarize: Rosie is questioning the confession on the basis that he was tortured (she is accepting this as a given), and might even believe (based on the third link which is, as noted, of a far more anti-Rosie editoral nature) that he had nothing to do with 9/11 at all.
The way she uses Bin Laden's name tells me that she may not even believe that
he was at all involved.
The bottom line is that it's all consistent with her being a CTer.