Market Capitalist states are responsible for a far larger amount of deaths than Marxist states in the same time time period. The classical fascist states alone killed around 50 million, including the holocaust & world war. Ten million people have died in Russia as a result of the free market reforms. That's about as many as Stalin killed but, surprise, surprise, the capitalists don't say anything when they're the ones doing the killing. Plus there's the Indochina wars, Belgium's atrocities in the Congo, the first world war, a zillion US-backed neo-fascist states, the Suharto coup + East Timor, genocidal sanctions against Iraq, Rwanda, Turkish Kurdistan, the Armenian genocide, and a bunch more.
King Leopold of Belgium murdered 10 million people in Congo, it was the first genocide of the 20th century. That's around the same number Stalin killed and substantially higher than Pol Pot. In terms of large-scale massacres Suharto killed more than Pol Pot. The coup in which he came to power killed between 500,000 - 1 million people, plus there's his later genocides. LBJ killed more people than Pol Pot. He was one of the main drivers behind the invasion of Vietnam (killing around 3 million), invaded the Dominican Republic, engineered Suharto's coup, backed the Fascist Coup in Brazil and backed numerous other neo-fascist states.