Theme number 1 - Iran is a bigger security threat and more important to deal with quickly than Bin Laden.Hmmm... A case of deja vu all over again, perhaps?
Theme number 2 - Iran is supporting Bin Laden anyway, via their intelligence services and funding, so going after Iran is really the same thing as getting Bin Laden.
Too bad they used these exact same justifications in the run-up to Iraq, really. If they would have saved them for Iran, they might have actually worked for the population in general. Now, all it does is read like the same tired reasoning as they used to bring about the fall of the Hussein regime.
I find it ironic, really. People will look at this and dismiss the possibility of Iran being a possible credible threat to the region simply because the former government of Iraq turned out to be an impossible uncredible threat.
That's not simply a case of shooting yourself in the foot. It's a case of firing an entire magazine into your leg before getting into an ass-kicking contest.