Well, by that logic the vast majority of Spaniards are racist (in fact almost all of us outside of the community that I described) and if I were to join that community, I could say that you guys are now racists towards Spaniards and our sayings.. See where this is going?
The statement itself (in a Spanish language context and in the Spanish context of sayings) was NOT racist. That is the crucial thing here.
There is nothing racist about mentioning Sambódromo either, there are plenty of carnivals very similar to the Brazilian ones in Spain (second largest in the world is held in Santa Cruz de Tenerife in fact) where people of all colors and origin congregate.
He basically just told Vinicius not to provoke opponents too much (I already provided evidence of Vinicius provocative behavior towards opponents and his insults towards opponents - I guess this does not bother anyone) and to behave himself in this regard (provocation department). Once again, 100 times worse things were said about Neymar, yet there was never any RM orchestrated media campaign (naturally) or media outrage, rather Neymar was considered the villain and as such treated much worse by opponents and referees.
And let us be honest, such provocative behavior is not tolerated in Brazil or South America either, there you would risk getting your legs broken.
It is a undiplomatic statement that should not have been said this way as all he could have said (to get the point across) was to point out to Vinicius that he should remember to respect his opponents.
Both Neymar and Vinicius, as great as they both were,/are had this Brazilian favela street football tendency to humiliate the opponent and provoke him whenever they felt like it, which obviously was met with reactions by their opponents. It is what it is.
Spanish football fans are very peculiar in this regard, they will cheer for their own players doing such a thing, but if the opponent player does it, they will be offended and talk about lack of manners, lack of respect etc.
What do I know, maybe all 48 million of us are racists without knowing it.