Is that racist? Can you tell a Norwegian from a Russian by their faces? Because I certainly can’t. 

Sure, there are adaptations that add minorities, and there are also adaptations that set them in WW2, or 90s LA. But if they’re doing a historical version of Lear, you’re not getting James Earl Jones in the lead. 

Lol where is it “big part of what ASOIAF and therefore Game of Thrones is about” like please point out the plots that rely on someone’s specified skin color to make sense. You’re fucking delusional

Sure, the Romans were about as diverse and cosmopolitan as it got in antiquity, but we’re talking about the middle ages, long after the Romans. You’re asking for a source, but do you have one for any of your claims?

If I were in Affleck’s shoes I’d do the same thing. It’s a big role as a superhero he was a solid choice for, in a huge franchise, he hasn’t had a lot of massive acting roles in recent years other than the ones he directed himself and Gone Girl. It didn’t work out for somewhat predictable reasons, but still. Same…

They’ve changed ages and appearance, but mostly within reason, and it still fits the setting (although Euron and Daario are both way too boring looking in the show). Making characters non-white would completely change their family history, which for most of these characters would be significant. Some characters would…

There was travel, but that doesn’t mean the average person saw immigrants, it just means there were some traders. Rome was about as cosmopolitan as it got back then, but if you were a peasant in England in the middle ages what were the odds of you ever meeting a non-white person?

It’s not even really racist, just inaccurate. 

There’s a spectrum between talking it out and burning pedestrians. 

Did Mansa Musa ever actually go to Europe? “One guy was aware he existed” is worlds apart from “if you made a show about a European civil war he would be in it”. 

Sure, there were more than zero, but the average person in the middle of Europe could probably go their whole life without seeing a non-white person until the last few hundred years. Throw in the fact that pretty much all the remaining cast members are hereditary nobility and you’re not going to get a lot of black…

The underlying factors that led to the medieval world being significantly less diverse than the modern one are all present in Westeros. You making up a deliberately terrible analogy doesn’t detract from that.

But not so much England, which is what ASOIAF draws most of its inspiration from. The presence of the Moors is a distinctive thing that sets Spain apart from the rest of Europe, it’s not some universal trait. You might as well comment on Russians interacting with China. 

A story can have any kind of bizarro-looking living creature it wants but oh no, a single Black person is a bridge too far?

It’s an option, but that doesn’t mean it’s a good one. Having internal combustion engines is an option, doesn’t mean it’s one I want in my fantasy shows.

The two who are still prominent now that the show is set entirely in Westeros, yes. What do you want? More speaking Unsullied? More Dothraki chitchat? You could count the number of prominent immigrants to Westeros on one hand before Daenerys showed up. 

It’s fantasy heavily inspired by history, though. Travel being incredibly difficult is a big part of that, it’s not like they have steamboats or something. The Dothraki haven’t spoken in a while, because they’ve never been that chatty, but there are tons of people from Essos with speaking parts, just look at Meereen.

Westeros is heavily based on medieval Europe/the UK, of course it’s super white. Also, there were plenty of minorities in Essos, the plot just isn’t there any more. I don’t watch anime based on feudal Japan and complain about the lack of white people.

In his writing, George R. R. Martin has made clear that the only previous time in the history of this fictional world that a weapon that wasn’t a dragon itself has ever killed a dragon was when a Dornishman landed a million-to-one shot from a Big Crossbow straight through the eye of a dragon, one of the only places…

I guess I missed the scene where Daenerys was burning random Meereenese pedestrians to death.