I was confused about that too, since I thought it was pretty well-established that this was not a race issue.. However, I discussed this with other Jewcers, and here's what we came up with.

We don't think that's well-established at all, the Arabic-speaking tribes involved in the conflict have supposedly been influenced by Arab supremacist ideology from Libya and they often use racist language during attacks on the Darfurians. But there are other issues involved besides race, and their own racial categories doesn't correspond to our own, since all of them are "black" by American standards, even while the racist language employed relates to the blackness of the Darfurians. All very complicated.

Despite all this, Joey (who compiled this originally) doesn't know why the term "racist slaughter of black African muslims" is in there, he didn't write it, and he wouldn't have used it as my primary description of the conflict. He says he originally described it in more general terms about the government murdering a problematic minority and was making an implicit Holocaust comparison. But during the editing process someone changed it to "racist slaughter of black African Muslims," presumably because they thought the Holocaust comparison wasn't strong enough to warrant the more general language.