Some might object, well the US shouldn't have been on the side of those terrible South Vietnamese oppressors. Who could forget this haunting image of the South Vietnamese police Chief and former general Nguyễn Ngọc Loan summarily executing VC prisoner Nguyễn Văn Lém (AKA Bay Lop)
what could this poor innocent prisoner have done to warrant such punishment, presumably it was just for being communist
Oh right, he had just killed Vietnamese Lieutenant Colonel Nguyen Tuan and massacred his entire family when he refused to cooperate with the VC. So the South Vietnamese police chief was executing an enemy spy caught out of uniform who had just massacred a group of civilians (which execution is not a war crime) whilst it was the North Vietnamese controlled VC agent who had just carried out the war crime.
But then that doesn't fit the narrative of 'oppressive South Vietnamese vs communist liberators' so its disregarded.
And this single-handedly proves that South Vietnam was a free society how exactly?