Jim,
I am sorry that you lost your job. I can only speak of my experience. I will tell you that I have never ever ever ever seen a manager disciplined because of a grievance at least in the area I work in. To make this an almost short story. I was fired over an FMLA issue. I went to my boss and asked for some time off which he verbally aproved. I put in the paperwork and left. He disaproved the paperwork without telling me. When I did not show up for work the next day I was fired for being AWOL. During the period before this happened my doctor had called and talked to the boss about my taking time off and the boss agreed. When we got to arbitration the boss was asked if he had talked to the doctor and agreed to give me the time off. He said no he had never talked to my doctor. One of the reasons I won was because we produced my medical records where the doctor had made notes about talking with my boss and my boss agreeing to the time off. That particular boss lied under oath at the arbitration. Nothing was ever done to him about that. I was very lucky because I owned my home outright and had no car payments, house payments etc. If I would have had bills I could have lost everything I owned while we were fighting over getting my job back.