Well, your U.S. government-sourced propaganda is certainly definitive ... but you mind telling me how they came by those numbers?
How many of the 5 million Wehrmacht soldiers killed by the Soviet Union should have been left alive? How many of the other victims of the Soviet Union or the Chinese or Vietnamese governments were victims because they were communists resisting the pro-capitalist trajectory of the state?
How did communists manage to kill 2 million in Cambodia when they never held power there but did help drive the murderous Pol Pot regime from power? How did they kill 1.7 million in Africa when no African country has ever been socialist? How did they kill people in Afghanistan when communists opposed the invasion?