When I got taken in by an AIDS denial film a while back, in amongst the scoldings from outraged rationalists (including Ben Goldacre) I got this message from one Seth Kalichman: "You have no reason to feel bad about this. AIDS denialists are very convincing. They are a mix of narcissists and conmen. I think I know these guys and what makes them tick as well as anyone can. It is extremely easy to buy into their crap."
Kalichman is the author of Denying AIDS, a definitive account of the global AIDS denial movement. While researching the book he went undercover and met many of the key players, including Peter Duesberg (that's undercover-Seth on the right with Duesberg in the picture). And he proves he does know these guys well, in the piece he kindly wrote for New Humanist exposing the sinister tactics of the denialists, as well the motives of this strange band of shysters and victims. It's a brilliant piece. I urge you to read it.