I think we should examine the effectiveness of bans on speech r.e. limitation of the spread of an ideology. For example, according to the Southern Poverty Law Center (not a group with an incentive to deflate numbers), at its peak the National Alliance had 1,200 members. All together, there are a few thousand active Neo-Nazis in the United States. In contrast, let's take 2 countries where advocating Nazi ideology is i…
I don't think comparing the adoption rate of Nazi ideology in nations where it was historically successful to nations where it was historically unsuccessful is appropriate. A more equivalent comparison is Nazi ideology in Germany/Austria to Klanist ideology in the United States. The list of US politicians with Klan affiliation is long. [0]: https://en.wikipedia.org/wiki/Ku_Klux_Klan_members_in_United...
Also, The Southern Poverty Law Center estimates that there are 190 active KKK groups with between 5,000 and 8,000 Klan members in the U.S. That's a far cry from Austria and Germany.