I don't think this was their fault. I think it was an accident. After all, the plane was headed towards a country in Eastern Asia. Russia is not at any conflict whatsoever with them. Why would they want to strike down a plane with people headed there for in the first place, right?
Now there will never be 100% proof of anything when it comes to this; But there are too many hands in the pot. To many agendas going on. Plus I believe the plane shot down was a Malaysia flight (red flag). There is just too much that could be gained that I believe it highly unlikely to be an accident.