Because I have a Celtic studies website, every October my email is peppered with messages from two large groups: fundamentalist Christians of various persuasions, and Neo Pagans of various paths. Both sects are writing to inform, deny, assert or correct me regarding Halloween and the Celtic feast known as Samhain in Modern Irish (Samain in Medieval Irish). The amount of email (and comments) increases every year. And the articles posted all over the Web get a little more annoying in their diligent perpetration of myths. Several years ago I even wrote my own FAQ What Is Samain or Samhain to try to stem the tide, to no avail. Both groups…