Maybe you meant to ask why a Republican would watch it instead of why a conservative would watch it.
Apart from not minding the head on a pike thing though, I wouldn't like something with all the sex in it this has. It appears to be inspired by Maurice Druon’s Iron King historical fiction series about King Philip IV of France with fantasy elements grafted in. I couldn't get through the first book on those, accurate as they largely are.
Martin said it was inspired by him watching his pet turtles fight and die over tank space/territory.
Sorta makes more sense, now, doesn’t it?
:)