The Khmer Rouge were not communists.

China, the CIA, and MI6 backed them solely because they were against the NVA. They were tools. And they severely lacked an ideological backbone which is why shit go so bad in Cambodia. It was fascism.

Like I said before Wikipedia is average tier knowledge, but sometimes it compounds sources well, so follow the sources: https://en.wikipedia.org/wiki/Allegations_of_United_States_s...

And it would be inline with what it has been proved the US did in that same time frame in Indonesia as well, and for very similar reasons too.

Sure dude.