I mean they changed a lot of NPCs in the overworld to use the black features. Walk around Stormwind sometime. They also changed some NPC's in Silvermoon to be black as well. Kul'Tiras has had black NPC's for awhile. None of these characters are evil or shady.
The leading character in Exile's reach for Alliance (something ALL new players go through IIRC) is black with a black son.
This is literally just people making up misinformation then creating a fake group of people to get outraged at their misinformation. Very very strange behavior lol.
Black representation in WoW is fine.