From my perspective, a character or characters in a story which act and talk in a racist manner, while in it self, is disgusting (to me at the very least) if it is within context, i see no problem with it. There is and has been many people over the years who are or were quite frankly racist. This is a truth, it might not be nice, but thats what it is. However when the author professes to a racist position or writes a story which promotes a racist position as being a good thing, then thats when i have a problem. To look at Racism subjectively, maintain a neutral postion and tell a story involving it is a hard thing to do.