Read Shawn Macomber's article
Voltaire’s Missing Brain,

With regard to the Holocaust, the facts are very basic. So, first and foremost, there is no reason to believe any true deniers could gain traction. The world, as a whole, has elevated the massacre to a place in human consciousness few other events hold. Ironically, the most powerful tool deniers have is this idea that they have been silenced and must have been silenced for a reason. If they are kooks (and I must reiterate, for sensitivities sake, I believe they are), why not let them be unmasked as such publicly, with all the ridicule that entails?

and don't miss his blog return of the primitive.