Well - I hardly see myself as "Polite Society" and certainly not politically correct; that said I don't go 'round .....-slapping people who are verbally abusive. I'm no great intellectual either - but I try (when I have the presence of mind) to return verbal abuse by having a pithy retort - or not letting someone who's either stupid or insane get under my skin. I'm a great believer in the saying that, Violence is the last refuge of the incompetent.
If I'd been writing the script, Marquez's response would have consisted of rolling his eyes at Rossi's foolish ravings, laughing in his face and leaving him in the dust at every race.
When I was in Vietnam - a guy at motorcycle repair shop said to me, when a foreigner loses his temper and blows his stack at one of the locals, he has at best, lost the game; we consider someone who resorts to violence over an insult, as having lost his mind.
Getting into fist fights over insults is something I did as a teenager. I've got the results of multiple broken noses to prove it. So I make no claims of being Gandhi Jr. But yeah.... I don't think Marquez kicking Vale's ... would have been a useful response. The boppers would have rioted, and forum members would be crowing over how Rossi had mind-...... Marquez into doing something stupid.