A tyrannical government is by nature in a constant state of war with its own people. There are periods of truce, but none of real peace. We in the democratic world generally think of government as an institution established by the people to serve their needs, even if it often fails. But the rulers in a place like Iran are more like conquerors presiding over a subject people.
Sometimes, like right now, that fact becomes inescapable, even to subjects who had imagined they were in the care of humane and benevolent guardians. Iranians who voted for Mir Hossein Mousavi, only to see their votes disregarded, now discover their country is ruled by an organized-crime gang that is prepared to use any means to maintain its grip.