"Ukrainian rebel commander posted something about shooting down a Antonov at about the same time MH flight crasht......I can see it happening that way, rebel crew with a missile system of what they are not exact sure how to handle it, let alone being able to recognize plane types on FL 33."
I also think this is what happened, however if you are ATC(or FAA or whatever authority) you simply don't allow planes to fly over a warzone, it's stupid and sooner or later has to result with this...