I think it's just a different culture.
I used to live in Rome, and even we went out a lot, I've rarely ever seen my Italian friends more than a bit tipsy. Getting drunk like you do in England ( and we do in Denmark) is just not their thing, and isn't a lot of the frenzy in England fueled by alcohol ? Not all of it of course, but it's just not the italien style to be running screaming through the streets or climb busses. If they win though, I image the town piazzas will fill with people, and probably be a lot of people driving around with flags out the windows - that would be more their way of doing it i think.