This refers to the crisis in the 2000s in the Darfur region. Awful things were done, and should be punished.
When will the decades of genocide and religiocide by Sudan against people in what eventually became the nation of South Sudan be recognized, prosecuted, and punished? That was a rhetorical question, because the UN supported and enforced those atrocities.
Darfur was Arab-Muslim-on-black-Muslim atrocities. South Sudan was Arab-Muslim-on-black-Christians-and-animists.