I don't think there's any historical figure more used as an insult than Adolf Hitler. Back in 2006, Donald Rumsfeld compared Hugo Chávez to Hitler. Now Chávez has compared German Chancellor Angela Merkel's party to Hitler's fascism. This is because she had said things like:
Chávez then indicated he would stop insulting her because she was a "lady." Classy.
"Based on our experience in Europe, I don't believe that state-guided economies can provide a better or more sustainable response to such pressing problems."