I tried to watch the documentary. Couldn't finish, I thought it was too slanted. I once worked with a doctor who had been a GMO in Vietnam. Ted had gone to Rice on a ROTC scholarship in the 50s. Joined the marines, then UDT. Then medical school, Vietnam. He was at Hue for the Tet offensive. When the communists took Hue, they ordered the school teachers, nurses, police to report for "reeducation ". When they showed up, they were forced to dig their own graves and executed. We killed maybe 80% of local insurgents. South Vietnamese hated the VC. None of this occurred to Walter Cronkite, who proclaimed the war lost. To understand what happened, read Eleni and David Horowitz 's The 60s, the destructive generation. Eleni is about the Greek civil war. I never realized why people fought for communism. They fought to try to survive the ruthlessness of atheistic communism. Horowitz exposes the anti war movement from within. All of the leaders of SDS except Tom Hayden were "red diaper babies." They actually went to a socialist elementary school in New York. They weren't anti war, they were pro communist. The rank and file was smoking dope and didn't want to be drafted. When we left, the killing began. It wasn't just Cambodia. Every nation taken by the communists suffered a massacre.