Why is anyone critical of Obama labled a racist?

I am so sick of hearing this. Olberman's show had this tool of an editor from Daily Kos, Waldman, on tonight. He said Republicans are either crazy or racist. Give me a break. I would whole heartedly support any race/gender President if I thought they were doing the right thing, but he is not! This administration is corrupt, out of their depth, and just an all around mess. That has nothing to do with race. It has to do with common sense and a sense of right and wrong. Are libs and this President so weak and fragile that they have to try and discredit ANY voice that criticizes? If so, should they really be in charge of governing a high school student council, let alone the last world power? And before you throw around the racist label at me, answer the question libs!