That’s why more information on the questioning is so helpful. The quote said it was a professor trying to learn what the grievances were.

The difference with holocaust deniers (really quite an uncomfortable comparison of millions murdered to the demands of a few dozen rich, spoiled young adults that perceive violence) is that there is an existing evidence base documenting the holocaust. You can’t skip this step and there’s a lot of soul searching for the harm is caused to the collectors of that evidence.

Skipping the evidence base and going directly to no questions is a stupid approach in that it will not help people understand and avoid future harm.