So, this is the paragraph that had everybody's panties in a twist:
Arabia is the D&D world’s version of Spring Break: you go there for a change of scenery. For this game, you don’t want or need to understand the difference between Shiite and Sunni, or the difference between Persian folklore and Arabian folklore. You just need to know whether the fire mages are on your side or not, and maybe a few simple rules of behavior: the bond of salt, the times of prayer, or the correct way to speed a camel through the desert.
Let's try a little experiment and change some things up.
The Savage North is the D&D world’s version of Spring Break: you go there for a change of scenery. For this game, you don’t want or need to understand the difference between Aesir and Vanir, or the difference between Norse folklore and Germanic folklore. You just need to know whether the ice mages are on your side or not, and maybe a few simple rules of behavior: the bond of fire, the times of prayer, or the correct way to walk in snow shoes through the tundra.
Are you white people offended by that?
No?! Ohh...
The fact that the linked article opens with,
"Someday, in some glorious future, white people won’t say stupid things that show how oblivious they are to the things that people of color have had to deal with, every day, ever since someone decided to define some people as white to begin with," tells you ALL you need to know about the real motivation behind this "outrage:" it was a white dude talking about brown culture. OF COURSE there had to be something racist in there... they just needed to dig around really good and look for it.
Also, author of article says this:
"[Being white] also means that I need to address problems when they come up, especially when it’s in media I enjoy and promote, and when it was produced by people that have similar privilege to what I enjoy." Don't worry brown folx! The White Savior is here to free you from the oppression of tepidly-worded guides on world building.