That is smart view of Milan vs Napoli match where  main question is if Milan home field advantage can stop Napoli great form. You are right that Milan will try hard to use their home crowd but it is fair to wonder if that will be enough to stop very strong Napoli side. Napoli is playing with such confidence and skill right now that they do not seem bothered by playing away. To beat such strong Napoli team Milan needs more than just fan support they need perfect plan and exceptional defense to stop Napoli main scorers. If Napoli plays as well as they have been Milan home advantage will likely just lead to difficult and close game and not guaranteed win.