This is obviously a total tragedy and should never have happened but it has and all eyes are now on Putin.
It is not just the West, it is not just Europe, it is not just America that should be spoken of as the whole world is watching and the fatalities crossed all boundaries. The UN should be doing more and for once they should 'tell' Russia enough is enough. Putin will take no notice but his stance will weaken him on the world stage and his allies such as China just for once might not back him, as is the norm, hopefully diffusing his power somewhat. The danger there of course he comes out fighting as he has a messiah complex and that is why he has to be dealt with by his allies alongside his perceived enemies. If the likes of China back Russia over this then the stakes are really high and quite frightening .
As for America I would think they and possibly other countries have full knowledge of where the missile was fired from, what missiles were in the area and who fired them. They probably would not disclose their knowledge thus far as they would be admitting using covert surveillance but it would only be stating the bleeding obvious. It would or could however raise the stakes to the detriment of any hope of finding a peaceful solution. I would hazard a guess all the 'backroom chat' will never be known to the likes of us for quite some time to come.
Germany has to be stronger in it's views of this as well. It has tried hard to sit on the fence over Ukraine from the start, to the point it has by now got a splinter in it's bum, it can't keep wriggling. It will be interesting to see how strong Angela Merkel really is.