Davem, I may not be following you entirely, but I simply cannot see the logical basis underlying your assumption that Tolkien was intentionally preaching at his readers in a conscious attempt to convert them to his beliefs. Just because he had certain beliefs and made his writings consistent with those beliefs, it does not follow that he was intentionally trying to sell those beliefs to his readers. Indeed, when he started out, he never even imagined that he would have any readers, other than friends and family.
Edit: And can someone please explain to me what this "Truth" is that we are supposed to transcendentally be brought to when reading Tolkien's works? It appears to have been eluding me entirely all these years.