High School Coach Loses Job Over Song

An assistant football coach in Tennessee was fired over a song he wrote, produced and posted on Youtube.  Some parents complained about the topic - they didn't agree with his point of view and the school saw fit to fire him.  Apparently, freedom of speech only goes so far in some areas of the country.  Take a listen and judge for yourself.  Any thoughts?  Should he have been fired?  Should he take the case to court?