About one-third of the way through Suzanne Vega’s terrific new one-woman film, “Lover, Beloved,” about the life of great 20th-century American writer Carson McCullers, the folk-pop singer-songwriter – playing McCullers in a tour de force of acting (and singing) – says, as McCullers, “I wanted to write about a Jew. You see, because, we are all concerned about what is going on over there in Europe. There are some terrible things happening.” Lover Beloved Trailer from Arts+Labor on Vimeo . The reference is to McCullers’s most famous and successful work, her 1940 debut novel, “The Heart Is a Lonely Hunter.”...