I clearly said it's history mixed with fantasy (thus the Dragons and shit). Nearly all the battles, all the clans and family feuds, the crazy events like the Red Wedding are based/influenced by real events and most of the fantasy is based on centuries old folklore. You should know that man.
I'll leave you with this:
I can describe an axe entering a human skull in great explicit detail and no one will blink twice at it. I provide a similar description, just as detailed, of a penis entering a vagina, and I get letters about it and people swearing off. To my mind this is kind of frustrating, it’s madness. Ultimately, in the history of [the] world, penises entering vaginas have given a lot of people a lot of pleasure; axes entering skulls, well, not so much. -GRRM
I want his books to be finished too and I probably agree that this whole thing got out of hand for him and he's been struggling to find ways to finish, but he certainly wouldn't be the first writer to have that problem and it doesn't take away from the great work he has completed.