There's been a concentrated effort by the woke to infiltrate and "fix" Warhammer 40k. They feel that the grimdark and the fascist elements of the setting inspires it's players to be fascists. GW has been slowly falling to them as older staff quit and are replaced by woke idiots who pander "just a little bit" to them.
For example, the new lore states a muslim woman created the Space Marines, not the Emperor, or somesuch trash. She only gave him part of the instructions because she could tell that he, as a straight white man (note: He is none of those things -- not straight, not white, not human) wouldn't be able to use them properly.
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The latest book has a random purple haired woman on the cover and a random Ultramarine... who happens to be black. This is kinda a wash in the lore -- Space Marines go dark as fuck or pale as fuck depending on how much sunlight they get, and always end up looking "by default" like their Primarch; the Ultramarines' Primarch is very white, but if that particular marine had been in a desert, he would have been pretty dark skinned indeed. And Ultramarines recruit from a shitload of worlds, so, it's not unheard of that they'd have a black ultramarine -- except he'd be as pale as Gulliman after being turned into a Space Marine.
As for the purple haired woman, the authors tend to like to make any non-spacemarine a sassy woman or a soulful black in order to get their diversity bingo cards punched.
Infamously, ADB, one of the worst writers working for GW, wanted to make female Adeptus Custodes but was shot down HARD by the higher ups at GW. He also virtue signals all the fucking time about how he loves to force the readers to read about random brown and black people, random women (especially lesbians), etc, because it "pisses the right people off."
It's only a matter of time before those higher ups retire, are forced out, or are convinced by ADB and the like that "no seriously, we'll sell 50,0000000000000 more copies of 11th edition if you give us big titty ultramarines and tranny blood angels."
The big names behind this push are the Sigmarxism subreddit (whos mods have taken control of all the other warhammer and GW subreddits) and "Feminist 40k." They also have full control of the various news blogs, and 4chan's /tg/ is pretty infested with them.