It's simple, if Race Direction had proof that Marquez deliberately ...... with Rossi they would've said he did. They couldn't find any proof, they had access to everything to prove it other than as Michael said mind reading equipment. But still no proof, if all the data they had from the weekend can't prove he did indeed .... with Rossi on purpose then he more than likely didn't. DORNA wanted nothing more than a Rossi vs Lorenzo in a straight up fight in Valencia and their dream would've been for Rossi to win. If RD was able to prove that Marquez ...... with Rossi at Sepang(and again they had available information to do so) they could've given him an even more lenient 'penalty' because of something along the lines of Rossi breaking the rules but we proved that Marquez was maliciously slowing Rossi and trying to end his championship dream because of a personal vendetta. Race Direction wasn't able to and you know as well as I do that they sure looked hard.
Marquez believed he had the pace to get away from Rossi, but stated Everytime he got in front of Rossi Rossi would then get in front and slow him - why is Rossi to be believed about this but not Marquez despite Rossi famously doing this before.
Without Rossis pre-race comments on Marquez do you think that he gets such a lenient penalty?
Mike Webbs public statement was an embarrassment to the sport. He deflected part of the blame to the victim without any proof. He said that he believed that Marquez was lying and trying to end Rossis championship while saying that he believed Rossi was telling the truth and didn't mean to make Marquez crash despite a non racing and malicious move that did so.
When asking yourself who was really trying to slow who think about this, Rossi was pushing so hard that he nearly high-sided 3 or so times but despite how hard he was pushing and how on the limit he was he still out broke Marquez to get in front. Much like he did to Stoner in Laguna, the difference between the two races is that Marquez unlike Stoner will give hard moves in return and will fight like a dog for position. None of this proves that Rossi was trying to slow Marquez however Rossi did have more reason to do so, experience doing so and the ability to play the media so it didn't look like he was the one guilty of ruining someone's race.