The term "Racist" is commonly used as an ad homonym attack by inarticulate leftists who are not intelligent enough to devise a counter argument, so therefore "pull the race card" in order to rob their opponent of credibility.
Caleb: "Did you know that illegal immigrants are accountable for thirty percent of all criminal activity in the United States? I personally do not want to pay for their social services out of my taxes. Secure the borders!"
Keith: "Erm... well... You're just a racist! You should be ashamed that you can't look past the color of someone's skin! Hey--look everyone--there's a racist over here!!"
*Twenty minorities turn and gaze angrily*
Maria: Join the KKK you F***ing racist!!
Gustavo: Let's beat this white guy up!!!
Rodriguez: Claro que SI!