I think this is a bad analogy but I'm having trouble putting into words why. I don't think any random infamous murderers (except maybe Jack the Ripper?) are considered "historical figures" on the level of Hitler, the ""legitimate"" leader of Germany at the time. He was responsible for lots of deaths but he wasn't a "serial killer" and there's a lot more taught about him at school, so it's trivia that a lot of people could guess. Pol Pot is much less discussed in North America (referencing your other comment) so questions about him would make less sense.

Anyway if the trivia was about Manson and Dahmer, it would be really strange but somehow I doubt it would make headlines or there would be such an official statement released.