All of this who did it and why will be irrelevant as it will get sadly brushed under the carpet, as neither Russia or the USA want or at this moment in time can afford a conflict. Nothing will happen and it will quickly become yesterdays news, sad but true.
Because it was above the designated no fly height and military intelligence have said no threat, they were not the only airline to fly this route. At the end of the day its all too easy to blame the airline, why would you think someone would blow a plane out of the sky. having said that it has...
Don't care if it is a small area or not, when you walking onto a plane destined for anywhere in the world the last thing you should be worried about is being shot down by a missile....
there is no right conclusion as to if, why or who other than it's wrong.