Human Rights activist Simon Deng answers the question, "What's going on in Sudan?" From Deng's perspective, the US response to the Sudanese government's actions depends on who is in power and which group is the victim of genocide.
Deng sees the Sudanese people as his family - both Muslims and Christians. Deng explained: when the Muslims are the victims of genocide - the democrats get involved - when the Christians are victims - the Republicans stand up for justice.
From Deng's first-hand perspective, the divide isn't over religion but rather Arab Vs. African identity politics.
The Arabs don't claim brotherhood with the black Muslims but see them as a separate people.