If I recall, that is actually what happened, the show wasn't supposed to go on forever, which was why the season was gearing towards the weirdpocalypse finale.

I, uh...

The problem isn’t that it will all go away eventually, but that they thought that this would be a fun idea in the first place.http://panels.net/2016/05/26/on-…

I’ve got that comic. The difference is he was never implied to be one his whole life (thus undermining the message of the character), and was pretending to be hypnotized by the skull so he could sock Hitler again.

No one who is angry thinks it will last forever. A lot of the anger is cause it is just a publicity stunt. And there is a differnce between making him a mythical monster and making him a Nazi. Especially given his origins.