Not to discourage healthy arguments, but at least the section on Heston on bowling for truth I found to be as oppinion-based as the works of moore himself, instead of fact-based as the webmaster claims. So I wouldn't suggest using that parts, at least.
I found that closing segment of his movie to be sickeningly sensationalist (with the picture of the girl and all) and that sorta steered me against Moore's methods ( but not nec. against the message of the movie, which is that americans are taught to fear, because a fearful man is so much easier to control) but that doesn't mean I'll just buy any counter-argument around.
And so that we can all laugh I present this link from the bowling for truth website:
Petition to revoke the Oscar