Turns out Linthead is not an entirely reformed character. Yes, he does flip flop from his prior pose on the gas chambers; now he says they existed. But, er, that darned "Holocaust religion," he says, has inflated that number of Jews killed. Not 6 million, as the real historians say. Some lower number, which I think he did offer, but which I couldn't quite hear for sure since he has this tendency to mumble or trail off, and though his English is good, either his heavy accent can make him hard to understand in English...or maybe the sound quality was not that good.
At any rate, he blames the Bolsheviks for initially inflating the numbers, and everyone else for going along with it. I'm obviously not expert enough to defend the six million figure on my own, but it takes a lot more that paranoid suspicion to rebut it. Will he have more than that in Parts 6 and 7?
You already know that answer.