While I'm not aware of any formal study on the matter, I do remember them going over the subject at length in a forward observer course: the blame for the major

While I'm not aware of any formal study on the matter, I do remember them going over the subject at length in a forward observer course: the blame for the majority of airstrike blue on blue falling on the grunt calling for fire. It matched my experience as well - to the point that I'd avoid calling in close air support for anything short of a Custard's last stand scenario. This isn't anything like that, a command center continuously calling in attack aircraft on a target repeatedly identified as non-hostile - being put on and taken off of the situation board... unprecedented. Even if my opinion of the command staff was so low as to grant them a "well, maybe you are just that dangerously incompetent" - the lying makes that even harder to believe (technically impossible claims wrt speed and offshore shelling capability).