Matthew C. Smith : Obama 's appearance at Arizona State brought out racist protesters . Report : Sign ##ed , ` ` Impeach the Half - White President ! '' and some sang ` ` Bye Bye Black Sheep '' Protesters blame Obama for the tension , but his detractors ignore it , Smith says . Some activists assembled to plead with the president to take more aggressive steps to combat climate change , such as renouncing the Keystone XL oil pipeline . Report : Arizona protesters were loud , but such racism is ubiquitous , should worry us all .
Matthew C. Smith : Obama 's appearance at Arizona State brought out racist protesters . Report : Sign ##ed , ` ` Impeach the Half - White President ! '' and some sang ` ` Bye Bye Black Sheep '' Protesters blame Obama for the tension , but his detractors ignore it , Smith says . Report : Arizona protesters were loud , but such racism is ubiquitous , should worry us all .