All National Geographic aside, both Tolkien's and Lewis' faith are evident in their writing.
Tolkien was/is not a founder of a new religion, but the follower of a very old one. And, as an author, his religion became a part of his writing. You can't found a religion when one's already there.
The word
catholic means 'universal'. Thus it can encompass all, and I think Tolkien's work can encompass all religions. So...it's up to the reader.
But
Fordim pretty much said that...
