I think I'm fairly impartial on this one (as I couldn't give two shits either way). So looking at the two on-board footages below of Hamilton (first on-boards I found on Google), and the racing line he takes into turn one:
[youtube]--fjSaQEm2w[/youtube]
[youtube]ahOuZU5VoQM[/youtube]
Then if you compare that to Kimmi's line, its very similar.
[youtube]qvSb0TSjfnE[/youtube]
So in conclusion, Kimmi was on the normal racing line, and Mag tried to dive up the inside. Mags fault.
Now you can tell me why I'm wrong.
There is more than one line to a corner, faster entry slower exit or vice versa make the line a driver chooses vary. This corner in particular lends it's self to the up and under, Mags was probably trying to position himself on the outside of Kimi for the 2nd part of the turn to straight line and get the power down earlier.
Regardless of whose at fault, I feel it was just a racing incident and neither driver should have been penalized.
F1 wants overtaking but what's the point if a mistake is made by the driver? Does f1 only want DRS yawn fest overtaking?