I have no idea about the flight or what happened. If I have to guess, my best one is that the separatists shot it down, by mistake - a simple fuck up. And if you ask me it is of course a tradgedy, but (if Id be right, again) a mistake none the less - the airliner did fly over a warzone after all. They should have admitted it right away, not starting to use it as propaganda tool and play the blamegame.I think we've come to the pretty much same conclusions here at maanpuolustus.net too. It looked like Ukraine was about to end the insurgency in eastern Ukraine when things changed without any plausible official explanation from Russia or "Novorussia". Everything pointed to the direction of Russia supplying equipment and manpower.
What do you think happened with MH17? Russian BUK with russian operators or some variation with local captured equipment and operators?
Again, pointing out - this is just what I think. My guess is as good as yours.