The WHO that is saying this is HUGE!
James is a famous guy in the early church, but he has a more famous brother! James is the younger brother of Jesus – think about that!
His story is one of the greatest testaments and strongest points of evidence for the Christian faith and to Jesus himself being who he says he is! He doesn’t really show up in the story of Jesus as it’s unfolding, he doesn’t makes his appearance until after the story of Jesus.
It's then, that something happened! -- AFTER THE RESURRECTION.
Think about this: James stood with his mother and watched his brother be crucified and then a few days later he had breakfast with him on the beach.
If that happens: YOU’RE CONVINCED. All other theories are tossed out the window, all other preconceived notions are now replaced!!
James emerges as the leader of the church in Jerusalem, where all this stuff went down and happened. You can read about his death, Josephus (a jewish historian writes about it). James was killed for his faith and he died declaring that Jesus wasn't just his brother, but His Savior!