I don’t think the comparisons being made are relevant. First, clearly, fantasy monsters (vampires, satan, etc) are not relevant (“If you can dress as satan, you can dress as Hitler”? Sorry, that’s just totally irrelevant.)
The comparisons to costumes of Pol Pot, Hirohito, Staliln, Saddam Hussein, Charles Manson, Jack the Ripper – those are also not relevant. Yes, they did unspeakable things, but no one is supporting them now. Thye’re dead and far away. There’s not a lot of pro-Stalinists around anymore, there’s no neo-Pol Pot movement, I haven’t seen any Mansonites in the news recently, and the “Jack the Ripper was unjustly accused” society hasn’t got a large following. But Hitler is still worshipped, there are plenty of neo-Nazis around calling for murdering Jews and blacks and restoring racial purity, and it’s (IMHO) vastly inappropriate for a Halloween costume.
Now, if it’s made into fantasy (as suggested above, zombie Hitler, or bullet-ridden Hitler), OK.
I offer alternative comparisons:
- Dressing up as a Klu Klux Klan racist, carrying a noose. Sorry, that’s in hideous taste. (Note, again, if you do something like painting the red circle and diagonal line meaning “NO” on the hood, that’s different.)
- Dressing up as the Columbine murderers in Colorado
- Dressing as Jesus carrying the cross
Those costumes are offensive, and would be offensive, to the majority of the population. Offensive and disruptive.
Again, obviously, if you’re invited to a private party where you know everyone shares the same (sick) sense of humor, fine, come dressed as Jesus or Hitler. But if you think you’re going to offend a significant number of the people who see your costume… well, why?
[philosophic rant]We live in an age when being shocking and offensive is considered chic. I hope we grow out of it.[/rant]