How about Vietcong atrocities against innocent civilians and American soldiers?
The leftists never cared about that, and they aren't going to start now.
They also ignore the communist genocide that followed the collapse of South Vietnam in 1975, or twist themselves into knots trying to blame it on Nixon. So far as I'm aware, the only reasonably prominent antiwar figure who spoke out against the slaughter in Cambodia was Joan Baez. She was immediately denounced by a pack of her former movement pals, with Jane Fonda taking the lead...
Precisely. No one ever mentions that, do they?
That doesn't count. Just ask any journalist.
How about the millions that died from Pol Pot after the U.S. withdrawal?