No joke, start digging into the guys who made ancient aliens and not too long after you start seeing Nazi shit in their past. Like explicitly so, not tangentially related, not "neo" but actual Nazis. Historical revisionism is literally the basis of the show, so you shouldn't be surprised that the main players are Holocaust deniers.

Wanna know who wrote the book the show is based on? It wasn't Von Daniken. He only wrote the first, unsuccessful draft. Utz Utermann rewrote the second draft that actually became very popular. Guess where he was from? Guess what he was doing during WW2? Writing propaganda for the Hitler Youth and working as the editor for Nazi newspapers. I'm dead serious.

Ancient Aliens is just soft selling literal, actual mystic Nazism and it always, always, always has been.

https://en.m.wikipedia.org/wiki/Wilhelm_Utermann