Look at the Russian revolution, the army took the side of the people. Countless other revolutions have the army deciding that beating and killing their own people is out of bounds of their job descriptions.
I’ve heard that the leadership has imported arabs from Lebanon to help patrol the streets and beat people. I’ve seen reports that some of the attackers are speaking arabic, not farsi.
This is the last gasp of a dying regime. Let’s hope it dies quickly.
The Guardian is now reporting that 12 Iranian students killed in crackdown after violent clashes
http://www.guardian.co.uk/world/2009/jun/15/iran-students-protest-election-results