In the US, at least, the current (seemingly unsuccessful) slouch towards tyranny definitely does involve the revival symbols of a particular defeated regime: the Confederacy (https://www.nytimes.com/2021/01/14/us/Kevin-Seefried-arreste...).
Though it might not really be a "revival," since the symbols were never really killed off in the first place. A lot of the flashpoints building up to this one involved removal of these symbols.
Yes I think so. In fact, that's precisely what the nazis did with the swastika.
https://en.wikipedia.org/wiki/Western_use_of_the_swastika_in...
Obviously banning a symbol is not going to prevent future violent movements by itself, but it also seems wise to not leave still-hot embers of symbolic power lying around for the next would-be demagogue to fan back into a fire. People trying to pick up those old symbols are giving a very strong signal about their ideology.
I agree that the main bulwark of a society against falling into fascism is its people's memory of the past and willingness to prevent recurrence of such episodes though.
It wouldn't have to. But having watched Hitler sell the idea that Germany was being unjustly punished for Jewish lies a generation earlier, they drew the conclusion that [West] Germany was quite likely to see would-be tyrants rallying around a Lost Cause narrative and that vulnerability to this was a bigger problem than a lack of diversity in holocaust historiography. Or more straightforwardly, they figured German democracy faced a more imminent threat from neo-Nazism than a slippery slope towards an Official State Version of History. A view which seems to have persisted even after reunification with the East which had considerable recent experience with the pervasive censorship involved in promoting its Official State Version of History.
The post Civil War US is an experiment in taking the precise opposite stance to postwar Germany: positively encouraging the losing side to romanticise their cause so long as their revisionist history downplays the slavery bit. Some northerner presidents even paid tribute to General Lee. I think it's difficult to argue reconciliation and race relations have been helped the resulting counter narrative that it was actually a pretty noble thing to defend their way of life against other states who only pretended to be concerned about negroes though.
The point being, it's not clear whether German speech laws are frosting or cake. If the German people wanted to destroy Europe and themselves, that would be enough whether they did it with the symbols of a defeated dictator or not. People point to European speech laws as examples of reasonable protections, but I'm not sure if they're stopping anything. The real bar against the collapse of liberal democracy is the fact that the people living in those countries don't want it to happen, and understand why it would be bad for them.