In the 1930s, Hollywood studios gave the German counsel veto power over prospective scripts to preserve access to a lucrative international market. Businessmen like Henry Ford lobbied to maintain friendly relations with the National Socialist regime, to protect his business interests in the country. Does any of this sound familiar to contemporary viewers? Yet, co-directors Ken Burns, Lynn Novick, or Sarah Botstein, never draw any parallels to the Xinjiang genocide, which their PBS brethren at Frontline described as “the largest mass incarceration of an ethnic group since the Holocaust.” That silence is deafening in their new three-part documentary analyzing American...