All the info that I see states that the rebels have the Buk system (supplied by russia) while Ukraine does not. The Buk goes up to 71,000 feet. You are saying the opposite. What need are you watching?
All the Info coming from most likely guilty party (Ukraine) states that.
Besides, have you seen that fucking Buk system? It is a 3 big trucks an it has to operated by a bunch of people who know what they are doing.
Regardless what you think of Putin he is not a complete idiot to give it to rebels.
So it's 90% ukrainian forces, and 9% rebels which somehow got a hold of the complete Buk system and somehow managed to use it.
and 1% Russians trying to shoot Ukrainian plane and hitting Boeing instead. But I am really too generous here, Russia does not need to do that.