(Credit: Rosselina Garbo) Can traditional opera really influence modern society and force it to reexamine its shortcomings? Can it impact the pressing issues of our times? Certainly, the powers that be at the Teatro Massimo opera house in Palermo believe so. And, judging by their opening night presentation combination of two short operas, Sergei Rachmaninoff’s “Aleko” and Ruggero Leoncavallo’s “Pagliacci,” {…}