Arvenski said:Why would Iran shoot down a Ukrainian airliner? Unless it was just a mistake made by a trigger-happy gunner...
I would doubt that gunners have such an authority as to decide on whether to launch a rocket or not. There must be rules of engagement and approval from a higher authority for such an action to be undertaken. It all depends on what these rules of engagement say in the Iranian military doctrine and how alert the AA units were during that time, which I assume was set to the highest level. That might partly explain how the decision to fire was taken hastily.
I still cannot wrap my head around how can you target an airliner just taking off from the main airport of your country. They must be used to see that flight path on a regular basis on the radars.