BRTD, you realize that most of these revolts were well to the left of the Bolsheviks, right? Sergei Bertdev probably would have been a loyal Leninist in opposition to the True Leftist hordes.
Your actual question is too broad for me to hit either FF or HP on. The Mensheviks were awful and willingly aligned themselves with fascists and militarists, while some elements of the Left SR and the actual soviets were certainly FF's, and their crushing was the first and biggest step in the degeneration of the USSR into a bureaucratic authoritarian state.
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