I recall a long series of news stories about five or eight years ago suggesting that the Iranian public was on the verge of uprising to overthrow the government. I assume that this sentiment was quashed by the government's rather violent response over the years ensuing. So, what's the current internal state of Iran? Are there a large number of dissatisfied and relatively "progressive" younger people anxious for more freedom, or have they been quashed or subdued to the point that the regime really isn't threatened from within?
Yes and no, let us recall the day after 9/11 George W's approval rating went from 50% to 90% it is human nature to rally around the leader when confronted with an outside threat, even if you don't really like that leader. At the end of W's time in office, Americans no longer felt threatened by Iraq, or to the same degree threatened by terrorism so he no longer had the rally around the leader factor.
Politics in this country has not gone the way Iranian progressives thought it would. We talk an awful lot about bombing them back to the Stone age. That is a unifying factor, and of course the regime ruthless crushed the opposition.