Yes, Rossi ran MM wide but that was only half of the cause of the crash -- the other half was MM leaning on Rossi' leg despite being run wide. Rossi was intimidating him, he refused to be intimidated, it was wall against wall but MM's was in the weaker position.
He could have avoided the crash by accepting to run wider, there was ample room to do that; of course then he would have lost contact with Valentino (which was what Vale wanted -- push him wide, oblige him to almost a stop, and get rid of his harassment, which was real and intentional also according to race direction).
Also, the danger of Rossi's illegal maneuvre is being exaggerated out of proportion by those trying to throw all the blame on him and make a great racer look like a criminal. Speak of character assassination...
Rossi's action made the two slow down to almost a stop, but there was no intentional contact by Rossi, and the corner offered meters of extra asphalt on the outside -- the intimidating maneuver by Rossi left MM the room to avoid contact and the crash, but like Vale he was in bullfight mood so it went as it did.
But the danger o the situation was minimal, the two had risked much more at full speed in the preceding two laps.
