You really haven't said anything specific that shows that your place in the workplace is being affected by this person's 'behavior'. Just a wide statement about favoritism, bad decisions, and peferring to speak with his/her's own race. These are just general comments with nothing specific backing it up on how your job is being affected. Really hard to relate with your position with just general comments on how you perceive things. You admitted you are nosy, and that is just how it is sounding...like that woman in 'bewitched' that lived across the street from samantha and always wanted to know what was going on at the witch's house.
Perhaps you should consider the possibility that most are not agreeing with you because they just don't agree with your perceptions and decision. It is always possible that the majority is wrong, but the possibility also exists that you are wrong. It does seem like you made your decision already when you posted, and that you really rather enjoy debating it with everyone.
I am rather pleased to find out that not everyone is a snitch. That people do like to mind their own business. Until you make it more clear on how this person's actions are screwing up your worklife, I am going with the majority also. And there were some good answers too.