I hope the loss of MH17 and her passengers puts your pathetic and utterly unjustifiable little war in perspective and causes you to end it.
Commentary. I think it is likely that either the Russians supplied the rebels with advanced surface to air missile systems (SAM), or the rebels acquired them from actions against the Ukraine military. I think it is possible but unlikely that the missile was fired by the Ukrainians. Some half-trained rebel unit got excited and squeezed off a round. It might even be the case that they had no idea that there was an active international air corridor over the area.
I also think that the Ukraine government, airlines and air regulators owe explanations as to why they allowed an air corridor to be maintained over a war zone where sophisticated weapons capable of downing fast jets are regularly used to effect. My bet is that it has something to do with the fuel costs associated with rerouting and finding the answer they liked regarding air defence capabilities in the region that allowed them to maintain air corridors.