At the risk of being called a lover of Pol Pot I have to admit that I just find the number of dead attributed to him to just make no sense. Take Vietnam as a reference point. For the US the war started about 1961 and ended in 1975. The most intense bombardment the world had ever seen. It included Laos and Cambodia. More bombs dropped on Laos alone than were dropped during the entirety of WWII by both sides. We had astonishing bombing runs. Imagine a row of 5 B-52's. They'd completely destroy a strip 2/3 of a mile wide and 2 miles long. Everything would be killed, including those that were not in the actual blast zone that would die from the shock wave as blood streamed from their ears. The world's most powerful tools of death controlled by the world's most well trained death makers all with the goal of maximizing the number of dead (hoping to achieve the "crossover point" where the dying rate exceeded the replacement rate), which meant civilians dying at an astonishing pace. We're bombing dams to destroy their ability to make food. In Laos they're living in caves and trying to farm at night to avoid being killed. According to Wikipedia if you add in the further 6 years prior to the start of the US involvement the total dead on both sides is between 1.1 and 3.9 million. The population of the three countries at the time total was about 50 million. Between 55K and 195K dead per year for 20 years.
Contrast with Pol Pot. He had only 8 million potential victims. No saturation bombing, none of the advanced chemical weapons created by the Dow Chemical Company. He had executions, malnutrition, forced labor. Yeah, what an ass hole. How many did he manage to kill? In 3 years? According to Wikipedia between 1 and 3 million. That's between 333K and 1 million dead per year. He's got no B-52's, no agent orange, no napalm, no white phosphorous. Are we really expected to believe this? He's supposed to have killed the same amount in 3 years that the US military killed in 14? Are all of our military personnel really that incompetent? Is Pol Pot really that much more of an efficient killer?
It just doesn't add up for me. My suspicion is that since he was an enemy of the state inflated figures are accepted without much challenge, whereas of course killing by Americans is being done by the "good guys" so every corpse tally must be justified rigorously. Probably Pol Pot's figures are inflated and the reverse is true for the US military.