When you consider the other things that have been going on it would be but Russia is going to make sure they have a chain of deniability. Would the West go to war over something that doesn't cause mass public outage and they can't pin on Russia with a high degree of certainty? I doubt it.

Actually whoever did it it seems like the best course of action for Europe is to not talk about it. Russia, USA, Ukrainian terrorists it doesn't really matter.