Coming from a country that sometimes gets a bad reputation for limiting free speech: I know at least one country part of the 'western culture' where swastikas are (generalizing) illegal. Please list a country where tiny horned figures are illegal.
I don't know about the 'white hood w/ burning cross' reference (I assume KKK?), but I guess those aren't a good example either.
Are you seriously comparing
a) a regime that killed millions of people and started the 2nd world war
b) a far-right, violent, terrorist (acc. to Wikipedia, depending on local legislation?) organization
with
c) a comic style image that might be connected by viewers with a fictional character representing (guessing here, didn't read the novel) all evil?
Everyone is free to have their own belief. But you sure overstate the problem here..