It's a bad idea to do that. To prevent a totalitarian state, there should be general and abstract rules that prevent advertising things that lead to a totalitarian state.

Having specific restrictions for nazism can have the opposite effect: people think everything is fine because there is no nazism, but other groups, using similar dangerous schemes will not be regarded as dangerous.

I found it interesting that the last time I was in Berlin, about a year ago, I kept finding the same stickers everywhere being used for vandalism, initially with an anti-fascist message and then just as many cleverly scratched over to change the message to anti-Semitic hate speech.

Equally interesting was that these things were everywhere and none of the locals I was with had ever seen them before. Out of sight, out of mind.

I am not convinced that it helps preventing totalitarian state, quite the contrary.