The trial of a 20-year-old man accused of trying to launch a neo-Nazi terror group began in the German city of Frankfurt on Tuesday. Marvin E., an aspiring carpenter and local politician, was arrested in September 2021 following a police raid at his house. Authorities discovered several self-built “unconventional” explosive devices as well as a racist manifesto and material intended for a recruitment campaign. Prosecutors say he made efforts to launch a local branch of the neo-Nazi group Atomwaffen Division — a racist and antisemitic terror group. They said he wanted to start a “race war” in Germany “to preserve...