I tend to disagree. In Schumacher's case he may have had numerous run-ins with other drivers, but he always showed respect to his teammate. After following Senna's career and at times apportioning blame to him rather than Prost my opinion changed completely after seeing the movie 'Senna' twice, in fact three times. In my opinion he had more integrity than Vettel has in his little finger. Regarding Alonso I only judge him on-track. The reason for that is his falling out with McLaren happened partly in private and we have only ever fully heard from one side and Alonso is unlikely to change that. From the moment he leaves the pits he has always repspected his fellow competitors and has never endangered another driver, which is why the other drivers rate him so highly.This will soon be forgotten. Previous drivers have done worse. Senna/Schumacher crasing into drivers and Alonso holding his own team to randsom over spy-gate. A lot worse F1 crimes IMO.
It was a petulant and stupid act. Nothing more, the significance it bears though is that Vettel feels he can push the team around and he might have just pushed Webber one step too far.