Well, the action and the response both seem about as frustratingly tone deaf as I've come to expect from these situations but I dearly hope this is one example in the sea of bad ones that eventually yields an understanding of exactly why they were in the wrong to do this.
But, it's internet new-media and gaming and there's a hell of a lot of room in that combined space to stubbornly carry on or double down with no consequences at all,
So for once instead of just saying "well fuck this garbage," I wish to respond like this:
1) The gaming community at large is now crossed over into mainstream society enough to earn a sense of accepted, relative ubiquity. Yeah, there are still some folks that like to scoff at it, but for the most part, it just belongs now. It has been validated. The ongoing call for it to go further as an entertainment and art form is not proof of further validation-seeking, it is simply the call to keep defining the media form, in my eyes a sign of existing validation.
2) Mainstream society in Western culture has some ongoing faults in its status quo that create real problems when it comes to equitable treatment and dignity for all of its citizens, and the history that created that status quo is still very hurtful in its legacy to people who have to live through the effects of that legacy today. The pain has not subsided. The sources of that pain have not completely ceased. Now that games are mainstream, they've become a part of this problem too, sometimes completely without wit or empathy for the actual lived pain of real people that have to suffer the lasting effects of history's social and cultural difficulties.
3) Just... Maybe don't do this kind of shit anymore, please, for reasons 1 and 2. Just because it existed already and existed in some cases with no obvious intention of doing harm to anyone doesn't mean that it exonerates the action and doesn't actually cause harm or perpetuate the existence of those social, historical hardships. Doesn't matter how much fun you're having playing videogames or how much you like the characters that maybe don't look like you, there is a larger social context beyond games that makes costuming a different skin color really painful for some people to bear witness to, because it used to be used almost exclusively for mockery and to degrade social standing through performed stereotypes. Just. Don't. Fucking. Do. It.