I looked through the thread, and the point about Tolkien's wizards has not been addressed. And it needs to be done.
If Tolkien's wizards are are not earth-bound angels, they're
heavily influenced by the idea. He discusses the wizards at great length and detail in his essay,
The Istari, found in the book
Unfinished Tales.
If I may, here are a few brief excerpts in Tolkien's own words:
Wizard is a translation of Quenya istar (Sindarin ithron): one of the members of an "order" (as they called it), claiming to possess, and exhibiting, eminent knowledge of the history and nature of the World. The translation (though suitable in its relation to "wise" and other ancient words of knowing, similar to that of istar in Quenya) is perhaps not happy, since the Heren Istarion or "Order of Wizards" was quite distinct from the "wizards" and "magicians" of later legend; they belonged solely to the Third Age and then departed, and none save maybe Elrond, Círdan, and Galadriel discovered of what kind they were or whence they came.
Recapping, Tolkien is less than satisfied with
wizard being an adequate translation of
Istari, since the Istari are entirely different in origin and were only on earth during a specific point in history; and I say
history since Tolkien purports all of his writings to be history that occurred on this earth.
Tolkien goes on to describe how men supposed they had accumulated their vast knowledge and handling of lore through years of study, but the Istari were in fact spirits who had assumed the bodies of men:
real and not feigned, but subject to the fears and pains and weariness of earth, able to hunger and thirst and be slain; though because of their noble spirits they did not die, and aged only by the cares and labours of many long years.
Elaborating more on the Istari's origin and ultimate fate, Tolkien continues:
For it is indeed that being embodied the Istari had need to learn much anew by slow experience, and though they knew whence they came the memory of the Blessed Realm was to them a vision from afar off, for which (so long as they remained true to their mission) they yearned exceedingly. Thus by enduring of free will the pangs of exile and the deceits of Sauron they might redress the evils of that time.
The role that Gandalf plays to both Bilbo and Frodo is legitimately understood as a visible, fleshly guardian angel.
Any 'magic' that the Istari perform (save, perhaps, for Saruman) are the same stuff as any of the miracles performed in the Bible by God's prophets or even Jesus himself.
The Lord of the Rings may have objectionable material, but wizards are not one of them.
As
@Sketcher mentioned, runes were the alphabet for Germanic and Norse peoples. It may interest you to know that þ, œ, and ð are runes and were early letters of the English alphabet and can be seen in Anglo Saxon writings and certain Middle English writings. After a time, they became obsolete as their phonemes were replaced by other letter combinations;
th for
þ, for example.
As a world-renown linguist and specialist in Medieval literature, it's understandable that Tolkien would have incorporated runes into his stories. In fact, in a collection of his posthumous works is a poem about Middle Earth matters written entirely in Anglo Saxon) Old English using Anglo Saxon alliterative verse techniques.
I will grant you this; Baum was involved in the Theosophical Society and some occult themes are present in The Wizard of Oz (I can't speak for any of his other Oz stories or any Oz stories outside Baum's canon); two that immediately come to mind are the notion of lost lands and the elusive Emerald City (and its ostensibly omniscient 'Wizard')'s similarity to the emerald tablet of Hermes Trismegistus.
Sorry. When I see misrepresentation like this, I need to address it.
tl;dr - The Lord of the Rings may have objectionable material, but wizards are not one of them.