Kissinger bombed hundreds of thousands of innocent Vietnamese, Cambodian and Laotian civilians, and they gave him a fucking peace prize because he finally stopped.
He is responsible for Pol Pot's rise to power so he's indirectly to blame for Pol Pot's regime. You can't bomb a country to hell and not be responsible for the aftermath.
None of them attacked innocent civilians in Cambodia: Kissinger bombed innocent civilians in Cambodia. And then after it became known that Pol Pot was a genocidal lunatic, the west started supporting Pol Pot AFTER it became known what he did until his death, while the communists attacked and deposed Pol Pot.
It's always the same: the west murders indiscriminately people in the global south and then act all innocent when this radicalizes the survivors.
Edit: you also mention Vietnam. What Kissinger did there was also monstrous.
He sabotaged the peace process in Vietnam because it was going to happen under Johnson and he didn't want Johnson to carry that win into his election against Nixon.