You're not actually allowed to call _anyone_ by swear words, here. It's §185-192 in the criminal law book, and you are free to report anyone calling you anything. They can receive a fine, or up to 2 years in jail.
https://www.gesetze-im-internet.de/stgb/BJNR001270871.html#BJNR001270871BJNG005102307
The controversial bit is actually paragraph 188, which raises the punishment further, if the victim was a politician. It's become an industry; using companies and AI systems that just go around looking for mean tweets and then suing people.
Anyone can report, even if they are unaffected.