The discussion has narrowed to distribution of ability score bonuses when making player characters, but I think important context is gets lost unless you look at the bigger picture.
The fact is that in some D&D settings there exists races of people that are born inherently dumb, irredeemably evil, or both, and that they are a plague upon the land coming to kill you, and it is virtuous to slaughter them and their children. "The only good Orc is a dead Orc." This matches really close with white supremacist beliefs and narratives, and how white supremacists describe Muslim and Black people and justify their hatred.
It is a reasonable thing to wonder why the Orc gets paired with dark skinned people. But that has been going on since Tolkien invented Orcs, which were dark-skinned. Since the publication of the Lord of the Rings, white supremacist groups have taken his work to be an allegory of the struggle of the aryan race*.
Quote:
"For years, Tolkien scholars have waged a fight on two fronts: against an academic establishment that for the most part refused to take the author's work seriously, and against white supremacists who have tried to claim the professor as one of their own."
― David Ibata, Chicago Tribune
To this day, I've seen white supremacy groups making memes about immigrants being depicted as the Orcs in the LotR movies.
Anyway, all of this isn't D&D's fault exactly, but the creators built the game and its fiction and its language on top of this mess. Sure, Orcs are green now and not black but the association remains. And it's bothered people for a long time, especially people of color.
I think it's worthwhile looking at this connection to our hobby and untangling it.
* Tolkien was very vocal about not taking his work as allegory.