Sorry, but many "in" that country did.Iraqis don't speak Farsi.
My oldest son was there from April 2004 to April 2005 with the 1st Cav Div whom relieved the invasion and first occupation forces, in time for the violent eruption from Sadr City which started the 2004 insurgency (within days of their arrival 'in-country').
He told me shortly after returning back home that about half the insurgents his unit dealt with (killed and captured) in the Sadr City region of Baghdad carried grave markers written in Farsi. The Insurgency from about a year after the 2003 "invasion" and occupation of Iraq, starting in April 2004 and boiling out of Sadr City Baghdad (Etc.) was largely led and supported by Iran and it's surrogate forces posing as Iraqis while operating on behalf of Iran.
He was there; as far as I know you weren't !!!
Guess who I believe and give credence to ??? !!!
(CLUE: Another area where our USA Intel. Agencies seem not to have had a clue nor earned the monies we pay them. !!!