My conspiracy theory!
One painful fact which is very difficult for Bush's administration to admit is that AlQaida has got the US army and policy in a deep hole in Iraq, mostly due to the existing ethnic and religious differences and lack of understanding among the US administration on and off the field.
To scape the pain Bush and his guys are exaggerating the role of Iran in the whole region and specially the unrest in Iraq. They (Bush and Neo-Cons) are trying to portray Iran as the main cause of their failure, to make Americans believe that the failure is not (which is!) a result of the terrorist activities of AlQaida and the terrible handling of that matter by American administration.
In all these I blame Iranian president too, for not being smart enough (as a matter of fact for being stupid and selfish) to keep the nation away from all this crap and instead by talking irresponsibly about the most irrelevant subjects to Iranian nation, he has helped a lot to de-humanize this nation in eyes of the world public opinion.
have a look at this:
BBC Documentary: The Iran that we don't know!