People with ignorant opinions like that are either idiots or attention whores. In either case, it would be pointless/idiotic to waste breath on them.
This also works, since it is a non-violent, confrontational but efficient way of dealing with ignorant opinions:
Ramsus wrote...
Generally when people are bigoted around me I give them the "You're a fucking idiot" look until they shut up. It tends to work well as they can't tell me to shut up or try to argue their point as I'm not actually saying anything. Considering their reactions I'm fairly sure they knew that I was calling them an idiot and that they were too dumb to figure out a way to do anything about it.
But in all honesty, I enjoy a real "racy" racist joke or two, especially about my own ethnicities.