A crime as well inevitably include the understanding that the accused side wanted to commit the act of crime against the target of the crime intentionally, and knowingly.
I heavily doubt that the rebels or the Russians intentionally wanted to shoot down a foreign airliner full of foreign civilians. They know the bad looks they would get from the world in advance.
If it were an intentional shooting at a foirtewign civilian airliner and the shooter knew it, than in fact Kiev would have had the best chances to assume they could get somehting positive form thzat - bvy blamin g it on the rebels. This recipe would not have worked so well if the rebels or Russians did it and wanted to accuse Kiev, considering the state of things with Russia and the global opinion.
I doubt that it is by chance that the UN now joins the
rethorics blame game. I also doubt that right at this time that court fionds its verdict and announces it that Russia shozuld pay 50 billion in compensations to former Yukos owners. The timing and the effect of that (if Russia would obey that ruling

) too obviously aims at supporting the new attempt to bring Russia under more fiscal pressure.
Kiev's army apparently currently tries to storm all cities around the crash site to bring the site under its control that way.