On the other hand, no writer can divorce himself/herself from bringing forth theological, social, political, and familial viewpoints... probably the author's own opinion.
For example, J.R.R. Tolkien's, Stephen King's, and Ernest Hemingway's works are thick with their views on theology. A Christian, an agnostic (I'm assuming this as King's outlook), and an atheist all have written very deeply moving literature. I cannot claim to have read all of their works of fiction, but from what I've read... their views are inescapable, but I don't feel like any of them are up on soap boxes.
Mr. Martin, as any author in a free society, has the freedom to write with intent to plead his theological viewpoint. C.S. Lewis did just that... very pro-Christian material. But in free societies, we have the right not to buy or read the author's works if we so choose.
Now I wonder if the Sparrows, as agents of change and champions for the downtrodden, will turn the monarchy of the Iron Throne into more of a free and democratic society... or will they attempt to build a restrictive and centralized theocracy?
Under Aerys, saying the wrong word meant death. Under Robert, there seems to have been a lot more freedom of speech. Joffrey's and Tommen's rule (guided by Cersei) have been more restrictive on free speech. What will the Sparrows think of free speech?
On a side note, I am grateful to Mr. Martin for writing on such a grand scope and with such good character development. He's given me a lot to post on.