it was not friendly fire other side was civilian jetliner sir . please read the definition of friendly fire again .Friendly fires are a part of war .. they always happen in tense war zones. We Iranians have massive enemies lined against us unlike you so incidents like these are an eventuality.
LONG LIST of US and allies firing at their own targets
We should have imported pakistani air defence, the land where same US enters, lands its seals, kills people and leaves undetected. The same US which gets its multi million USD stealth aircrafts shot by Iran regularly..
We have massacred our enemies in Yemen, Syria, Iraq, Lebanon including US multi times. Something that you can not even dream of. You are just mad mad and still not over the fact that you were conquered for millenia by us Turko-Iranics.