Just heard some Aussie aviation expert on Sky News. He said it perfectly.
1) US are so anal about what you bring in bags (this new battery thing is complete bollox) yet they, and ICAO (International Civil Aviation Authority) said 32,000 feet was acceptable height to fly over this area. This plane was at 33k feet, they knew these missiles were in rebel hands yet were negligent, despite harassing passengers over irrelevant bullshit.
2) 28 Aussies died, this should not go unpunished/without reprimand. It IS an act of war; once we find out who did what we must act against them, albeit probably through diplomatic channels. You can't ignore English, Aussie and Dutch citizens dying like you can the Malaysians, shitty as that sounds.