Image via WikipediaAfter the regime in Iran is gone, an interim government will come into power. That interim government will hold elections to a constituent assembly. Iranians will have the right to organize political parties to contest such elections. That would include people who are currently part of the Iran state structure. But that would not include criminals.
People in power directly and indirectly responsible for unleashing brutality upon peaceful protesters are criminals. They have to be tried either in the International Criminal Court or by the interim government domestically.
Criminals don't have the right to vote, let alone the right to organize political parties.
Khomeini is a war criminal. He unleashed war weapons upon peaceful Iranian demonstrators. Khomeini has a right to not accept the demands of peaceful protesters, but he has no right to deal violently with peaceful protesters. But he did, and he is a criminal. That bearded, disheveled dude in Iran is a criminal. He is going to be in handcuffs sooner rather than later.