Racist taunts at Obama worrisome

Matthew C. Whitaker: Obama's appearance at Arizona school brought out racist protesters Report: Sign said, "Impeach the Half-White Muslim!" and some sang "Bye Bye Black Sheep" Protesters blame Obama for race tension, but his detractors promulgate it, Whitaker says Whitaker: Arizona protesters were loud, but such racism is ubiquitous, should worry us all