The President addressed bias when he was faced with it.  He didn't create it.    Are you seriously going to suggest that racial bas was not around before President Obama took office?     

The election of President Obama may have been made into a 'transformative' event, but it  was only one step.   Americans tend to want instant satisfaction. Blacks thought he would fix everything in the neighborhood - (feds can't fix your local problems).   Many white liberals thought casting a vote for black man would make them 'righteous', but it was only symbolic and they turned their focus away from racial bias.   

Neither party addressed the deterioration of education, housing, violent crime, conflicts with police,  72% of black children born to unmarried mothers.

Obama has asked the country to face it's prejudice - that makes some people uncomfortable, others get mad because prejudice is a part of their personal values system.