J4,
I am responding only having seen one angle so please do read this comment as such but I do understand the earlier comment and would suspect that the only way to know would be to analyse Rossi's laps at that point to watch how he changed direction at that point of the track to determine if he was trying to 'make' things look accidental or not.
Personally from what I have seen to me there is no doubt that Rossi changes direction in a hard manner but he was also somewhat offline due to the earlier rub from Marquez and as such he needed to be forceful in the change to get back to the line he needed for the corner at the speed he was carrying. Marquez on the other hand seemed to be on the usual line but was of course behind Rossi and thus it was HIS responsibility to make sure that HE would not be impacted by Rossi in any way.
IMO only but Marqez simply just got Rossi'd in as much as Rossi is the hardest racer in that field and Marquez just found that out.
No penalty deserved or warranted as this was Marquez's fault, even though I do feel that Rossi was making a point that he was there to race and so no quarter is to be given.
To me, I will be more interested in how Marquez replies and whether he uses youthful exuberance and outright punts Rossi, does he get all fired up and over-ride into error, or does he put it in the memory bank as a lesson and reply in kind when situations align
I totally agree whith you