Assuming that you're white, you're all racist.
Seriously though, the left is appalled that we would call Obama vile names even if we think them to be true. They've gotten a lot of mileage out of racial division and pandering and are afraid that those days are coming to an end.
They should be afraid because, apparently due to their dictatorial hold on American culture, the only thing that could break that cycle is for a minority to become the most powerful man in the world and be exposed for the vile power monger that he is. It's very sad.