Riddler came to power because of his charismatic skills.
Annoying Orange is charismatic too. He's mastered the art of tuning his rhetoric to appeal to dumb hicks.
Not to mention, Germany was in a critical state of decay.
Our economy is pretty much incomparable to Wiemar Republic circa 1930s, but Annoying Orange's nativism turns Muslims into the scapegoats for terrorism pretty much the same way that Jews were blamed for worsening inflation. Different problems, different scapegoats.
