Ignorance is bliss and the writer is either blissfully, or willfully ignorant of the fact that there are more bibles containing different books than just the protestant bible he grew up with.
By the writer's standard, Catholics, Eastern Orthodox, Armenians, Syriacs, Coptics and Ethiopians are non-Christian because they have bibles containing different books from that of the writer's bible.
You haven’t done your homework, Sir. You are the one at disadvantage here.