Who the Hell thought of this guy???

A writer during world war 2. Kinda obvious isn't it?

he was created in the forties I assume.

If it's the one that comes to mind he's an enemy of Captain Marvel. And part of the reason why Freddy Freeman, the current Shazam, walks with crutches.

C.C.Beck and Bill Parker created him. Is there any reason in particular why his existence is so shocking?

holy smokes!!! quadruple post. how'd you manage that one? :)

"Is there any reason in particular why his existence is so shocking?"

Ooh scary.

He's a villain.
No one's condoning his activities.

It's Nazi Germny we're talking about. Hitler tried to take the spear of Destiny (in the comics), and killed over 6 million people (and not all of the victims were Jewish little history lesson). Why is it surprising that he created a facist "White Superman" in  the era of the Mystery Men (and Women).