Yanno, I'm in the court that feels that when you're dealing with a product that is based on pure, factual Earth history (as in: Intended to be based on facts not fiction), it's best not to cast anyone of a skin color other than that of the historical figure.
However, when it comes to fiction, these days it just seems awkward that an entire universe could be envisioned where everyone except Lando Calrissian is white. I know there's a lot of news these days about people offended by black Valyrians or black dwarves, and many of them (looking at you, @Nymeria) like to cite stuff like "it's not canon!" and fail to understand that the greater questions by the populace are:
- Why was this world envisioned to be so monochromatic to begin with?
- Why so much resistance to expanding casting to nonwhite actors?
What's interesting to me is that the argument provided kind of parallels some of the issue BIPOC people face in America. That a person involved in producing fictional content is openly opposed to the casting of black actors, then is resistant to the existence of non-white characters on their MU because "that's how it was written, they're the majority, so sorry I can't make an exception!"
@Nymeria here is something you should consider. Many minorities have had to deal with exclusive behavior based on their minority status for a long while. They have a desire to see their inclusion in these exciting projects and see people who look like them fighting orcs and doing cool fantasy stuff. The reason why you are under the heat lamp of cancelation (which I feel is justified) is because your bigger concern seems to be clinging to this artistic accuracy (which, by canon means it's a whites-only club) and have very little empathy towards understanding why this makes people uncomfortable. There's no "let's see what we can do" or "I support this, let's try to find a way to make this work" but instead the stance is to openly decry the television show and double down on your stance that because the guy that wrote the content didn't say so...your hands are (airquotes) tied and cannot make exceptions.
Your MUSH is a fraction of a fraction of online roleplay related to Westeros, and in a dying medium, no less. I'm pretty sure the existence of GRRM's work isn't going to fall into absolute disarray because a damn brown person plays a knight. The whole world isn't going to gasp and say "OH MY GOD DO I EVEN KNOW ANYTHING ABOUT WESTEROS ANYMORE!?!?"
That's why the cancelation is a thing. It's not the "but this is canon!" it's the outcry and empathy-lacking response that smells suspiciously like bias.