Actually - I believe it is a parody of Nessun Dorma that is sung on the terraces, which might have some claim to 'folk' - somehow I very much doubt if the habitués of The Kop have bothered to grasp the subtleties of Puccini's Italian.
Perhaps I'll invite you to the book-burning when I make a bonfire of our collection of the century-or- so's scholarship we've compiled by all those arseholes with an agenda -
By the way - the name's Child - not Childe (wasn't the other one Harold, not Francis J - but what's the spelling of the name of another agenda-driven arsehole between friends)
Jim Carroll