Sometimes the only way to understand how another person feels is to walk in his or her shoes. Recently, Jimmy (and I'm not giving his last name for reasons that will become clear later), a white reader, inadvertently stepped in the shoes most black people walk in every day. Before I get to his story, though, I need to tell you a little something about Jimmy. At age 32, he probably means it when he says he has black friends. He grew up on the South Side of Chicago west of Western, the imaginary boundary line that 20 years ago...