What are you reading right now? (possible RotE spoilers)

[Valarya]

Also, is not the whole story a fight of good vs. evil?
Those fire-worshippers and the White walkers... If warmth vs. cold is not a symbol here for good & Evil, then what is it?

Martin pulls more from history and RL than any sort of ideas from the typical fantasy genre. In which case, you can't think of it as good vs. evil at all.

That would be like saying the War between the US and Iraq was a force of good vs. evil. It absolutely isn't. They're both good in their ways, and they're both evil. It all depends on where you're standing. Always.

It's why we have POV chapters from the Stark army and the Lannister army. The Iron throne and all the other thrones. To show you that it always depends on where you're standing.....

In Martin's world.. who says the fire-worshippers (Red Priests of R'hllor) are the good side? Who says warmth is good?

Bran & the 3EC are in the cold and darkness and they certainly aren't forces of evil.

One learns one can never make typical assumptions of Martin's work.