Mark Hughes, along with Nigel Roebuck and a small selection of others, is a pre-eminent Formula 1 journalist, and has unrestricted access to anybody who is anybody in the Paddock, so his reports, with the benefit of his many years experience, can be relied upon.
The incident resulted in the loss of a victory for Max Verstappen and the Red Bull team, so emotions were running high, and the aftermath didn't paint Verstappen or Christian Horner in a very favourable light. Ocon was clearly in the wrong (Martin Brundle said on commentary that even if the two drivers were fighting for the race lead, Ocon would have been in the wrong), and the Force India driver has a history of banging wheels and other parts of the car with his own team-mate, so he clearly can't be trusted in close-quarter combat.
Couple that with Verstappen's almost Senna-like belief that he can't hurt himself in a racing car, and the incident yesterday was always likely to end in tears. The two of them have "history" from their karting days, but the bottom line was that Verstappen was the race leader, Ocon was a tail-ender and should never be interlocking wheels with any of the cars who were at least a lap ahead of him. Something else apparently lost on the armchair experts is that at that point of the circuit the cars have very little grip, as they are not moving fast enough to generate any downforce, and the contours of the Senna S means that it's very difficult to change direction mid way through the corner. Verstappen had every right to expect that the track space to his right would be vacant, and as he was ahead anyway, the corner was his. Ocon must have accelerated and put his car partly alongside, albeit on the kerbs. Hence Brundle's view that Ocon was completely to blame.