SPRINGFIELD — An employee at a food processing company was fired after throwing a folder at his supervisor.Another was fired from her job tending to a Catholic sacristy when she objected to a training program on sexual abuse.A third worked as a home-care provider until she was terminated for telling a supervisor to “kiss my grits.”Besides colorful illustrations of things to avoid if you don’t want confrontations at work, these are all examples of cases in which employees were denied unemployment …