At a time when every controversial issue seems to get boiled down to a false choice of good versus evil, it is rare to see someone – anyone – take the effort to show the true complexity of the human condition. “Best of Enemies” (2019) goes back nearly 50 years to tell the story of school desegregation in Durham, N.C., through the eyes of a black community activist (Taraji P. Henson) and a Klan chief (Sam Rockwell). There’s no question they are adversaries, but the activist is not portrayed as a saintly martyr and the Klansman is humanized by his personal struggles.