Anyone who abuses the freedom of expression, in particular the freedom of the press (Article 5 para. 1), the freedom of teaching (Article 5 para. 3), the freedom of assembly (Article 8), the freedom of association (Article 9), the secrecy of letters, mail and telecommunications (Article 10), the property (Article 14) or the right of asylum (Article 16a) to fight against the free democratic basic order, forfeits these fundamental rights. The forfeiture and its extent are pronounced by the Federal Constitutional Court.
From the German constitution: