Why tell the truth when you can obscure the truth for your own agenda.
Obama actually didn't do enough to address the race issue until his last two years in office. He spent the first 6 years trying to avoid any race discussion because he knew as the first black president, his detractors would immediately accuse him of racism. All he did was acknowledge it existed in the end.
The thing that upset the racists was not Obama's stance and policies, but rather the fact that he was a black man and the president. That fact alone scared the racists shitless.