Tomwaits asks: "What would you accept as proof? "
Well, the usual holocaust denier would accept, say, a video of someone who looks just like Hitler who was pushing the button to release the gas, who then identifies him or herself as Hitler by name, date of birth, grandma's middle name, etc., and then the camera shifts so that we see someone inside the gas chamber choking, then lying still, and then Hitler swabs the inside of his own cheek with a q-tip and puts the contents into a bottle and then does the same for the corpse and then puts the corpse into an oven and switches it on and we watch the body burn to ashes through a glass door in the oven. Then Hitler signs a confession and puts all the evidence into a time capsule and tells us where we can find it.
And then we go and find the time capsule and test the DNA and it's Hitler's or a close relative and the gassee is a Jewish person and the signature on the confession checks out as Hitler's and ...
... but wait! It's all fake. The 'Jewish person' was an actor who did a good job of faking choking to death. The corpse was real, but brought in and switched for the live person while 'Hitler' was swabbing his cheek. 'Hitler' was a actor, too, and the DNA sample was switched with that of a descendant of Hitler's sister, who was paid to donate it and keep his mouth shut. The signature was a fake, generated by a master-forger who got hooker-visitation rights in return for the signature, and the documents were switched when the camera was on the oven door.
So, no, tomwaits, that's no good. Oh, and by the way, the world will end on July 15, 2009. And the south won the civil war. And the Republicans didn't screw up: George W. was a crypto-Communist ringer whose assignment was to discredit the Repub's and make them look like fools and greedy idiots who think you can wage hi-tech war without raising taxes to pay for it.
Oh, and by the way. I don't think six million died. That's a calculation based on demographics. The Nazis didn't keep documentation of all the killing. Towards the end, they just didn't have time to do the paperwork.