The best analysis I’ve read is here: https://www.thedrive.com/the-war-zone/31791/lets-talk-about-how-iran-could-have-shot-down-a-737-full-of-innocent-people htt

The best analysis I’ve read is here: https://www.thedrive.com/the-war-zone/31791/lets-talk-about-how-iran-could-have-shot-down-a-737-full-of-innocent-people https://www.thedrive.com/the-war-zone/31791/lets-talk-about-... Summed up as: older technology, possibly manned by reservists on the final hours of the graveyard shift, nervously watching a radar screen for a counter attack from an enemy known to use electronic trickery resulted in a missile being launched at a misidentified target.