Neymar is childish that is no secret. But Cavani is proving to be the dumbest person alive, more proof that being a top athlete doesn't mean you are an intelligent person. You have a state backed club whose sole job is propaganda and which has brought a leader-figure to this campaign, yet you quarel with him !! your role, sport Wise, is irrelevant. You can be 10 times more important to the team and it wont matter, they are going to kick your ass out.
Having said all of that, the second reason i find his ass to be dumb is their Relationship on the pitch, Neymar gave him mad asssists and, despite the goals he scored, he could have scored double that had he converted those potential assists, so why are you quarelling with your main provider! a player who plays behind you and whom you are most likely to outscore due to the positionning ?!! bizzare, if not, dumb thinking.
Of course this is not defending Neymar at all, they are equally responsible but Cavani has everything to loose, and by everything i mean mad cheese in the years to come.