You’d probably think there’s no connection between the Rodgers and Hammerstein musical, “South Pacific” in 1949 and the murdering Muslims of the 21st century. If you thought that, you’d be wrong. That musical explains these events. The most obscure song from that musical is, “You’ve Got to be Carefully Taught.” It’s low popularity is probably due to its dark subject, the injection of prejudice into the minds of children. Here are two of its verses, which make the point: You've got to be taught to hate and fear You've got to be taught from year to year It's got to...