(photo credit: Festival d’Aix-en-Provence © Vincent Beaume) In the audience, on my right side, a young person wears a T-Shirt that reads “Meyerbeer Fan.” On my left side, a spinster cries “Justice for Meyerbeer.” Rarely does an opera in concert raise so many people’s spirits. But, Giacomo Meyerbeer is not a composer. He is an idealist. History has Dreyfuss, but only {…}