(Illustration: Sophy Hollington for Bloomberg Businessweek)
(Bloomberg Businessweek) -- Holger Chen cuts a fierce profile with his skull-tattooed biceps, each bigger than a human head, and the oft-broken nose of a fighter. A mixed martial arts fighter, ex-Marine, former gangster, and owner of a chain of fitness clubs in Taiwan named after Genghis Khan, Chen has become an emblem of what he calls “defensive democracy” against disinformation from China. In his YouTube broadcasts, watched by hund...