Jjana Valentiner as The Frau in ‘Amazons and Their Men.’ Photo by Melissa Blackall. One of the most talented filmmakers of the 20th century made her reputation supporting one of the most horrific governments to exist during that period. That dichotomy has always been the guilt-ridden asterisk next to the name of Leni Riefenstahl in the estimation of film fans, critics, and scholars. She was a magnificent innovator and master of the camera, but…