saturn_656 saturn_656:
They knew they were civvies, they just didn't give a fuck.
Both pilots (both cases) told ground controllers that they were non-hostile aircraft, but ground control ordered them to shoot any way.
And, although they did pull the trigger, this was still USSR days, if they didn't, they, and most of their immediate families, would have found life very uncomfortable for the little amount of it they had left.
No, this does not absolve the pilots of their culpability, but it is not completely fair to say that they didn't give a fuck.