How do you know, how the next "Hitler" will look like? Do you think a "Hitler" has to have a funny mustache and behave like in the caricatures?
Has a totalitarian state always to come with a crazy person? How about a group of people, how about a system, where you don't see "one big dictator"?
The people in the 30s also did not foresee another big dictator rising. Other parties in Germany for example thought, they could "tame" Hitler.