German police have arrested two people after a series of raids against members of the far-right suspected plotting attacks on refugees, Jews, and police officers. Several of those detained were considered close to the so-called Reichsbürger (Citizens of the Reich) movement, an extremist group — resembling the U.S. Sovereign Citizen movement — whose members reject the very legitimacy of the German state. The main suspect is a 62-year-old self-proclaimed Celtic druid, who had posed calls for violence against Muslims and Jews.