Based upon the evidence presented by the writer it is a valid conclusion; at least it is certainly plausible.
If you are certain is it false simply present exculpatory evidence.
He also footnoted his stand on purgatory.. so that also MUST be correct
http://www.freerepublic.com/focus/f-religion/2712883/posts
Well, since Catholics aren't interested in *Innocent until proved guilty* for anyone other than their priests, why don't we put forth the claim that the pope is a sodomite and demand that the Catholics prove the claim wrong.
After all, considering Catholic church history and what is known about the behavior of priests and the cover ups by the hierarchy, it certainly is a plausible claim. The pope had to have started as a priest. That would certainly present as much evidence against him as those making the claim about Calvin.