Let's be fair here, I'm pretty sure those were overwhelmingly kangaroo trials (something that Che, for example, took great pains to avoid by making sure judge and jury weren't personally the victims of a given defendant). I don't actually have a problem with them being kangaroo trials, because they served an urgent social utility of dissolving a worse-than-worthless class that was forcing peasants to pay literally like 9/10 of their harvest as rent, but it was definitely more of a country-wide mob justice thing than trials in any sort of orderly or fair sense. At least, that's my understanding of what happened.