A few years ago German writer-director Felix Randau (Iceman) got what sounded like an interesting proposal from France: to direct episodes of a miniseries about Felix Kersten, the former massage therapist of Nazi SS leader Heinrich Himmler. “When I got back to Berlin and read their concept, I really liked it,” he recalls. “But there was this one special sentence in it that said, ‘If Steven Spielberg had known about Felix Kersten, he would have shot a film about Felix Kersten and not about Oskar Schindler.’ I knew that Steven Spielberg struggled for, I don’t know, about 10 years before he started shooting Schindler’s List, and he’s a…