>>Why, do you suppose, the Epistle of James is rarely or never read in churches??<<

Probably because the epistle tells us nothing about Jesus Christ at all. Not even that he was crucified. In fact, James appears to be saying that Jesus Christ has not walked on earth yet. When he exhorts his readers to bear their suffering, he tells them to look to the prophets for their inspiration in this endeavor rather than to Jesus which would indicate he never heard the standard gospel story.

Obviously, there were very different views as to who and what Jesus Christ was. A historical man is only one of many views at that time and a very minority view at that. He couldn't be historical and have such widely divergent views about him or he lived much, much earlier than we are led to believe and so his life is shrouded in mythology but that is really the same as saying he never existed.