The thing about this is: Do the Iranians believe this, or not?
It is a deep dilemma for them.
One of the NAZIs masterful intelligence successes was to convince Stalin that his entire top level military staff was compromised, just before the NAZIs launched their surprise attack.
As I recall, Stalin executed nearly the entirety of the Soviet Union high command, because of the NAZI disinformation.
As I remember the story (from William Shirer's The Rise and Fall of the Third Reich) Stalin executed about one-third of his officer corps as a result of the NAZI's infiltration and subversion of the Red Army's coded communication system.