Yep the North Vietmanese fianlly did after 3,000,000 people had been murdered overthrow the Khmer Rouge.
Huh, no mention by you that the Viet Cong and the Khmer Rouge, were actually allies against the American military during the Vietnam War, and they also had an ally in the American press.
But what they hey, you are into revisionist history.
Oh BTW, did you notice that the Khmer Rouge massacre happened under Carter's watch.
President Carter's National Security Advisor Zbigniew Brzezinski has admitted, "I encouraged the Chinese to support Pol Pot. . . . Pol Pot was an abomination. We could never support him but China could." But the U.S. did support Pol Pot covertly, including whitewashing his crimes. As Ben Kiernan points out in an indispensable Yale University Law School monograph entitled "Genocide and Democracy in Cambodia," the CIA in May of 1980 "denied that there had been any executions in the last two years of the Pol Pot regime."