At this time of year it’s impossible to escape the ubiquitous holiday music that assults us whenever we turn on the radio or walk through a shopping mall. Few listeners are aware, however, that the syrupy, commercialized versions of holiday cheer have their origins in the musical genius of a Jewish immigrant from Siberia, the phenomenal Irving Berlin. Whatever we may think of the 21st century interpretations of his work, it is undeniable that Berlin had the amazing ability to express the core values of American culture in a way that transcended religious ideology.