I agree with john (the poster) except to add or clarify that James, Jesus' half brother, is the same James in Acts 15. He was definitely one of the leaders of the church. I think that would be as far as we should go with that. The claims of James' status or any dispute with Paul probably comes from misapplying James' judgement in Acts 15. Possibly along with the judiazers in Galatians.

John Chaney

"having been firmly rooted and now being built up in Him and established in your faith . . ." Colossians 2:7