You haven't had a close enough look. The celebration you are talking about was a youtube video/audio released by the SBU (Ukrainian intelligence). I does not contain a confession. It contains a pastiche of various conversations spliced together.
It has one portion of a conversation where the anti coup forces had shot down a Ukrainian jet with a manpad some day earlier. this was spliced together with later conversations giving the appearance of it all being connected to the downing of MH17.
[YOUTUBE]https://www.youtube.com/watch?v=yKNx0-6bUbI[/YOUTUBE] There is no reason to think these conversations are all about MH17.
We know who did it. We knew right from the start; everything that has been said since by Russia has been a smokescreen to try to generate doubt where none was justified.
None of the evidence used to implicate the anti coup forces stands up to scrutiny. If you think there is some let's have look.
Have a good listen to the audio above. Why must it be aboyt MH17? It is not an incredibly convenient "confession". Why would there be any need for any investigation if it was genuine?
Armed with Man-Portable Air Defence Systems (MANPADS), the separatists have been taking down Ukrainian military aircraft since the beginning of June. On June 13, separatists shot down a Ukrainian transport plane that had been carrying 40 paratroopers and nine crew members.
http://www.businessinsider.com.au/u...-multiple-aircraft-over-the-past-month-2014-7