I've considered similar scenarios.
However, it seems like a gross strategic error to foment race riot, or to be seen as doing so in any capacity. He might identify with the victim (positing a sympathetic familial relationship), which would recast the event as an attack on new found black liberty/freedom, symbolized by the Obama presidency.
What impact would this have on voting in November, if people of a "racist bent" (republicans) didn't feel safe to vote? We might see Obama's long promised Civilian National Security Force, ostensively there to "protect" polling places, but in effect skewing the vote.
I know, I'm paranoid.