The holocaust denial

There has recently been controversy about some dinosaur priest, Mr. Williamson, who in a quite shocking interview on Swedish TV has completely denied the holocaust, even denied that there were even gas chambers on some very questionable evidence.
In general, holocaust denial is plainly stupid: it denies such a wealth of historical evidence, from official documents (of the perpetrators themselves) to first-hand witness accounts (from both perpetrators to victims), that people who deny the holocaust are either plainly stupid or, more plausibly, have a hidden agenda. Now, the hidden agenda can only be to create hate - they would be at the forefront of a new holocaust (and deny it ever happened...?).¨

That said, prohibiting holocaust denial is stupid. The interview with this "priest", clearly shows that he uses his victimhood (consciously or unconsciously) as a man who is not allowed to "speak the truth", calling himself something as appalling as a historical "revisionist" (which is surely no the same as a negationist...). He sees himself as a speaker of truth, and by prohibiting him from talking just gives him credibility - and honestly, I think the Catholic Church, by the pope's rehabilitation of him, must believe in his apparent "evidence" of holocaust denial (well, let us admit it, the Catholic Church has never really been known for respecting scientific evidence or for major tolerance).

Prohibiting someone from saying their opinion gives them credibility in a world where freedom of speech and manipulation of information go hand in hand.
There is such ample evidence that it happened, that people to deny it should be welcome to come with their fabricated evidence and made to be the fools they are.
Holocaust denials are idiots with a hidden agenda - let us expose them as such.