Do you remember the film Mandela: Long Walk to Freedom? You probably don't, even though it came out last year and starred Idris Elba. It was not well-liked by critics and did not even recover its budget at the box office, and William Nicholson–who wrote the screenplay—thinks he knows why: because 12 Years a Slave "sucked up all the guilt about black people."
For instance, he said this:
"(America) were so exhausted feeling guilty about slavery that I don't think there was much left over to be nice about our film."
He also said this about Mandela's rhetorical style:
"I know it sounds outrageous to say a thing like that, but when he came out of prison he made a speech and, God, you fell asleep," he said.
There is plenty to be said about white America's—and white Hollywood's—relationship with 12 Years a Slave, but a white guy who wrote a Nelson Mandela biopic despite finding the man boring is unsurprisingly not the one to do it.