Sort of off topic ( surprise

) but FQ wildly over simplified the conflict between Trotsky and Stalin.
Leon Trotsky was far more than a Che style trouble maker, and his revolutionary activities had nothing to do with Stalins hatred of him.
Trotsky, with no previous military experience took command of the Red revolutionary forces and built the Red Army from them, He was Lenin's hand picked successor and one of the few surviving Bolsheviks who was aware that Stalin had been an Okrana informant.
That was why he was exiled, to prevent him from challenging Stalin's power grab, but when he started writing from abroad that changed and he had to die.
You are right how ever about Che.
The darling of college students world wide, he had become an embarrassment, He attempted to spread revolution to the Dominican Republic and failed bloodily, He attempted to spread revolution to Africa, and failed bloodily, humiliating the Cuban military in the process. To get him out of his hair Castro sent him to Bolivia where he wandered around in the jungles uselessly until his East German KGB agent girl friend sold him out and finely got him killed, removing a PITA and creating a useful martyr to the cause.