Edited later to add:
The original press release seems to be gone now, but here is what is claimed to be the revised release, and an article on the same topic.
https://www1.wdr.de/nachrichten/polizei-dortmund-greta-gewaltbereit-100.html
https://www.yahoo.com/news/german-politician-calls-greta-thunberg-102611513.html
The German Authorities: still keeping alive the Authoritarian mindset and “protecting” those commiting Genocide whilst claiming to represent a “superior” race from “Communists” and “lesser” races.
You can get the Nazi Party out of Germany but you can never get the Nazism out of the hearts of the kind of German who seeks power.