Shit like this has me wondering if the supposed Culture War is actually just corporations doing the groundwork for future marketing that will basically be "if you don't like Product X then you must be some kind of racist".
So many entertainment franchises are marketed this way now that it can't be seen as just random actors mouthing off.
He is pretty much implying here that if you disliked the ending of GoT, especially if you are vocal about it, then you must be some kind of racist.
That's really shitty.