Let me tell you guys a little story (a true story, saw a documentary on it on TLC)...
There was a black man somewhere in the south that committed a murder, but the circumstances were not totally known. Nonetheless he was convicted and sentanced to like 20 years. Needless to say, he was a likable man and the guards at his maximum security prison came to believe his version of the story and ended up getting behind him during his numerous appeals/parole hearings until he was released after doing like 7 years. Well, as it turns out, he really did commit the first crime and after bieng parolled he commited 2 more horrible home-invasion murders and was later apprehended after a multi-state manhunt. Well, now he was convicted a second time (to death) and since the state isnt to large population wise he was sent back to the same prison, in the deathrow wing. Believe it or not, several of the same guards watched over him again. Well, you wouldn't be suprised to find out they were quite mad to be fooled and used the "N" word when conversing pertaining to him within earshot.
The story isn't quite over though, this man filed several lawsuits against the prison system for racism, bringing big news, the NAACP, and even a champion for civil rights, a catholic nun. She was so caught up in the whole affair (and, maybe a fetish or two of her own :P) that in the documentary interview she likened this monster to jesus in that both of them had been ridiculed by their jailers.
The morale of the story? If it was a white man who did this and someone called him a pervert, rapist, bastard, or any other derogatory term under the sun, it would be commonplace. Anyone else, its racism.