"I think a Godwin exception is permissible in this case."
I don't think what Mike wrote in 1990 means what you think it means. For your education, here it is in it's entirety: "As an online discussion grows longer, the probability of a comparison involving Nazis or Hitler approaches 1.".
Godwin himself further wrote "its purpose has always been rhetorical and pedagogical: I wanted folks who glibly compared someone else to Hitler to think a bit harder about the Holocaust."
Nowhere does it suggest never mentioning Hitler or Nazis. On the contrary, in fact. All it suggests is that you think before posting.