Prior to the Indonesian genocide of the 1960s, where the CIA installed a military dictatorship that the lives of millions, the country’s communist party technically did warn about the peril. The problem was that this warning had been made in a reactive way, and therefore wasn’t nearly enough to prepare the people to fight back.
Idk whom you are saying does this, but I will say specifically pcusa is into pettybourgeois alliances and irrelevant historical parallels, but consider MZT “ultra left” (of course the right deviationists will only punch left).