Don't be lilly livered. Looking at black turnouts and vote patterns its evident that color was the motivator for them, by and large. Even the esteemed Colin Powell jumped on that bandwagon; only chosing his words more carefully this time.
If two white men or two black men had run against each other the Rs would have won even if the candidates' positions and character and records had been identical. Shying away from uncomfortable facts that the black vote presents will mess up your future efforts. For now, teach by allowing the object lesson of government by O to proceed apace is enough.