I don't think anyone is in any doubt that the Russians are facilitating the rebels/separatists/numpties - Putin could publicly back away all he wants but it would make SFA difference. Firstly, as I mentioned, Russia's national defence is more important than a Malaysian aircraft (may have been different if it was German, French, British, Polish, American, etc.) and that means this will not force Russia to back off. Secondly, those involved in making decisions are well aware of Russia's imperatives and no matter what Russia/Putos says publicly they will expect Russia to continue with defending their sphere of influence.