Beacause I am a puppet
To sum up: I don't support allowing people get away with stuff, but I don't support policing the world and forcing our 'democracy' down their throats. I think what's going on in Iran is wrong, but really - what can the rest of the world do? (No, seriously. What can the rest of the world do without shoving our beliefs down the Iranians' throats and allowing them to naturally choose their own course?)
As a matter of fact, most reformists would probably hate being associated with the West, or would shun the misconception that their motives are in any way motivated by a desire to have that association.
But the US is also catching shit that we aren't interfering enough in Iran. Having earned a rep as world police, the US can't win no matter what stance it takes. Thankfully, Obama has been restrained and delicate for the moment (imo) and letting Iranians work out their internal crises on their own, despite the atrocities and charging people for the fucking bullets that kill their families.