Re: Does it really matter who shot it down?
"The transcript which puts the blame on the rebels even has them talking of shooting down an enemy plane and I can well believe that's exactly what they thought they'd done and intended to do. "
It could be true, but I think its a bit odd that military personnel capable of operating advanced defence electronics would be speaking in the open on insecure telephone lines, don't you? The veracity of that transcription has yet to be proven.
"A simple repeat of bringing down a Ukrainian transporter as they'd already done earlier."
Very different. The transport was at lower level, and believed to be brought down by a man-portable device incapable of reaching the altitudes at which civilian airlines were operating. A MANPAD involves far less skill (and thus implies less knowledge and awareness of the user), and has far more limited range, so couldn't shoot down MH17.