Red Army Faction in November of that year, the Federal Constitutional Court (Bundesverfassungsgericht) demanded that they return to custody. Only Horst Söhnlein complied with the order; the rest went underground and made their way to France, where they stayed for a time in a house owned by prominent French journalist and revolutionary, Régis Debray, famous for his friendship with Che Guevara and the "foco" theory of guerrilla warfare. Eventually they made their way to Italy, where the lawyer Mahler visited them and encouraged them to return to Germany with him to form an underground guerrilla group. The Red Army Faction was formed with
Red Army Faction events further catalyzed the situation. Protests turned into riots on 2 June 1967, when Mohammad Reza Pahlavi, the Shah of Iran, visited West Berlin. There were protesters but also hundreds of supporters of the Shah, as well as a group of fake supporters armed with wooden staves, there to disturb the normal course of the visit. These extremists beat the protesters. After a day of angry protests by exiled Iranian radical Marxists, a group widely supported by German students, the Shah visited the Berlin Opera, where a crowd of German student protesters gathered. During the opera house demonstrations, German student