9/11 is a Myth

There are psychological studies that say that someone who drinks the kool-aid on conspiracy theory A is more likely to also drink the kool-aid on conspiracy theory B. So there's a sense that Holocaust denial has sorta seeped to some degree into the wackadoodle ground water, and is to some degree championed by the same wizards who'll tell you not only that 9/11 was an inside job but that Apollo 11 was also an inside job, and that Paul McCartney really did die in 1966 only to be replaced by a Paul-alike.

But since it's also an inherently anti-Semitic conspiracy theory, you also get the phenomenon of truthers pushing back, and saying that ... well, you guessed it, that denier/truthers are actually government assets designed to make truthers look bad by associating them with what is such an obviously anti-Semitic movement.

So you encounter conspiracy types who (a) don't know thing one about the Holocaust (b) don't know thing one about where the Holocaust denial movement came from or who runs it but (c) are getting David Irving and David Cole and Fred Leuchter in their groundwater. Then when you pull out the facts, they explode and run away, or call you "Jew."