Preaching to the choir

This is on your “chat” comment.
I remember a recording of a speech by a prominent Holocaust-hoax historian to a bunch of his like-minded peers that my AP european history class listened my senior year of high school. As a Jew, even a marginal one, it was sickening to hear their hearty and agreeable laughter as the historian “poked holes” in the reality of the Holocaust. I felt like they were laughing at the deaths of six million people (the Nazis didn’t just kill Jews).
The teacher cautioned us beforehand that this recording was of a bunch of like-minded collegues, and that we shouldn’t take anything they said as directly derisive. It was hard not to, but I tried to listen to the details of what was said. I have to admit, I haven’t tried ot verify any of it to this day, but it sticks with me. I think I’ll look into it after all.

I imagine Catholics feel a similar punch to the gut when they read something like this. I think this leads to two important questions. Is he right about the details? What does it mean to you?