I have no doubt that ASL Napoli is filled with fans of their local club. However, then you have to go to the court to overturn the 3-0 and over there it's at best 50-50 I'd say. This time there's no contagion within the training camp, there's no possibility of spreading it.
Yeah, I know that fucking Juve is a national sport in banana republic called Italy but on the other hand try to imagine Inter's and Roma's reactions to postponement of this game - both would complain for sure and they're powers in themselves in the league/country too.