OK, so I stretched their point a bit.
Michael Isikoff and Mark Hosenball in Newsweek debunk most of the central thesis’s of Fahrenheit 9/11 with facts. These two are not Moore haters either; from the sounds of it they are big fans.
If you’re going to see the movie you owe it to yourself to examine the issues raised. The Newsweek article is a good starting point.