I don't doubt Naoto's move was an accident. Boosted 3.5 motors probably rip pretty hard. But Naoto made a mistake, aggressively got back into the race line and then ruined another competitor's chance at winning a world championship. Oh, and he didn't wait after doing it. All of that points to a sense of entitlement on the track we've seen displayed in the past, and was fresh in our minds after his little tantrum after A2.
His buddy Hayato was doing the same sort of thing at RRoC the first day, and they called stop & go on him every time after that and took the guy out of contention. I don't care how fast you are, if you can't do it clean, you're a loser.