>A party that wants to get rid of the system that enabled them to get voted for in the first place is anti-democratic.
Does AfD actually do that, though?
Yes, they do that by fearmongering, calling the current government a "cartel", as if such a level of corruption could only arise due to current democratic processes.
Only one instance can answer that, the Bundesverfassungsgericht. Getting that answer is part of the process to ban a party. Some people might not want that question answered.