I meant he would be dismayed more because of his love of language and ancient translation, and contrasted to the distaste of his fans' excesses. But I looked it up, and I was surprised to find that he did read the KJV. "The exact Bibles in Tolkien's library are not publicly known, but he probably used the Catholic Douay Version, as well as the Authorized (King James) Version" [1]. "Tolkien knew well the King James Bible of 1611" [2].
[1] (
https://books.google.com/books?id=B0loOBA3ejIC&pg=PA63&lpg=P...
[2]
https://books.google.com/books?id=O5WvohegkLcC&pg=PA76&lpg=P...