I have some sympathy for these views, and how you may have come to them, as it is clear the early history of both Christianity and the so-called early Church has been re-written and so is obscure.It is my opinion that there was only one important James in the earliest Church. ie: The James mentioned by Paul. The James mentioned by all the early histories, Clement, the gnostic gospels, and the gospel of Thomas:
He was the real James, not those other made-up Jameses who were invented by the Catholic church in an attempt to minimise the importance of James to the early Jesus movement.
What point was that? Was it that later texts were written by people who wanted to minimise James' position in the early church?
Hegesippus wrote that James led the early church. Everyone except the Catholic church accepts that. The Catholic church claim that Jesus handed control of the church to Peter, that way they claim direct apostolic succession and that the Pope has some kind of authority inherited from Peter.
The people writing the history that we have been led to believe is true were writing a few generations or more after the beginnings of Christianity, so they were more concerned with doctrine, and how the narrative would fit with that doctrine, than with accurate history itself.
I think the narratives started in the 2nd century and became to be set in the 1st century.