The Mandela effect itself freaks me out. How many thousands of people would sooner believe they are hopping parallel universes before they considered that they might be wrong, that their memory might not be perfect? That is horrifying.
Madness string 111357
The gas system started because Himmler himself looked away when the Jews were lined up and shot. The Nazi commander next to him asked Himmler how he could expect his soldiers to shoot Jews when he himself can't even see this.