

IMHO, if you’re discouraged by reality, that’s not my problem. I don’t like it when people just scream “ban” but don’t actually have a plan beyond that to get 30% of the voters to not vote for the next party that uses the nazi talking points.
You say that all the counterexamples don’t negate the one time it worked, but there is no successful example of banning a nazi party in Germany. They keep coming back. Learning some lessons is exactly what is needed here, because so far the NSDAP has been banned twice, the DVFP has been banned once, the SRP has been banned once, the FAP has been banned once, the NL has been banned once, attempts to ban the NPD failed twice before they lost funding in the third attempt, and now here we are and another nazi party is polling close to 30%.
Which “successful far-right party” are you referring to that was banned? The only right-wing party banned by Federal Germany is the SRP, and that one was fairly small. All the other attempts ended in a different resolution (i.e. not a party ban).
The NSDAP was banned by the Allied Control Council. Denazification was the Allied Control Council too.
None of this got rid of nazis. The AfD is only the current iteration. For my entire life, there’s always been some right wing extremist party that was big enough to be regularly mentioned on the news. Sometimes they randomly disappear and then another one rises. I even remember cases where one tried to become less extremist and then disappeared as a result of that (e.g. REP).
I’m all for banning them but it’s been 80 years that WWII ended and we still don’t have a real solution that actually works.