An article in The New Yorker entitled “The Iran Show” about the show trials notes that:

“It is one thing to persuade citizens that a narrow band of apparatchiks are enemies of the state. It is quite another to claim that a political agenda with broad support—for popular sovereignty, human rights, due process, freedom of speech—has been covertly planted by foreigners… Forced confessions, so effective in [previous years], convey little more than illegitimacy when they are used against an opposition that is asking for the counting of votes and the rule of law. Today’s show trials are a sign of how much Iran has changed in the past thirty years, and how poorly its regime has kept pace.”

[Full article]