As far back as 2009, some fellow police officers had voiced concerns about Mr. Gross’s far-right views, noting that he had brought books about the Nazis to work. But no one intervened, and he was even groomed for promotion.“There is no danger from the far right,” he insisted. “I don’t know a single neo-Nazi.”Soldiers and police officers are “frustrated,” he told me the third time we met, ticking off complaints about migrants, crime and the mainstream media. He likens the coverage of coronavirus to the censored state broadcaster during Communism. Instead, he says, he has a YouTube subscription to RT, the Russian state-controlled channel and other alternative media.In that parallel universe of disinformation, he learns that the government is secretly flying in refugees after midnight. That coronavirus is a ploy to deprive citizens of their rights. That Ms. Merkel works for what he calls the “deep state.”“The deep state is global,” Mr. Gross said. “It’s big capital, the big banks, Bill Gates.”