Sorry, Don Corleone, but it’s true. And you know what? It destroys Casablanca, too. And Ben-Hur. Citizen Kane? Fuck, Citizen Kane. Sing Street is here, and all these movies mean NOTHING to me. The year is 1985 in South Dublin, Ireland. Conor, a 15-year-old student, learns that his parents’ finances have changed and in order to save money,…