The Cole's notes version of their quarrel:
- Inadvertent contact between the two riders at the Argentina GP resulted in Marquez crashing
- Ridiculous last lap last corner dive bomb attempt at the Assen GP saw Marquez hit Rossi, push Rossi into the gravel, Rossi rode through the gravel full throttle and back onto the track to win the race.
- Ridiculous on track shenanigans between the two at the Sepang GP saw Rossi get fed up with what he believed was Marquez trying to trip him up. Rossi got inside Marquez in one corner then intentionally pushed him wider and wider to the edge of the track. Some people will say Rossi kicked Marquez' brake lever, others will say Marquez drove into the side of Rossi.... but Marquez fell.
- War of words between the two.
- Marquez, Rossi, Ianone and Lorenzo had what appeared to be one of the most phenomenal 4-way battles for a race win ever with countless position changes among the group, then at the end of the race Marquez suddenly checks out and wins.
- Rossi and some of his fans speculated that Marquez was intentionally tripping up Rossi to help Lorenzo win the title.
- Further on track action at the season finale at Valencia could be viewed as evidence to that effect.
Through 2016 and 2017 their quarrel seemed to have died down. Marquez didn't make too many stupid decisions between then and now.
If you go back and watch some of Marquez' racing highlights from moto3, moto2 and motoGP before you started watching you can see a pattern in his behavior. In one of his most stupidest displays of decision making ability he crashed so hard he almost went blind.