Lucas Banzoli is a very active Brazilian anti-Catholic theological writer, who denies that Jesus is immutable in His Divine Nature. In other words, Josephus uses adelphos [lit., “brother”] many times in a sense other than “sibling.” Thus, his meaning when he refers to James, the “brother of Jesus” isn’t certain.
Including a Handy, Nine-Point Summary of Solid Exegetical Arguments for the "Cousins" Theory of Jesus' "Brothers" Eric Svendsen is an anti-Catholic I critique in great depth Protestant anti-Catholic apologist Eric Svendsen’s dissertation on the Blessed Virgin Mary, regarding the so-called "brothers" of Jesus.