re: Could there ever be another Hitler?

Frank Amodeo came close. Was slowly building his own private military, Air Force included. His plan was to take over the Congo first and expand. Then he opened his psychotic pie hole and revealed his real plan at the UN Summit. Gov. methodically stripped him down,and threw his arse in the clinker.

Oughta look it up, fairly recent, and quite an interesting story.

Matt Cox has a series about it on his YT channel if you’re bored.