First thing I did was Google for the Snopes page. I am, if nothing else, a predictable liberal nerd.
To clarify, the OP is on my friends list, the openly racist commenter is someone I don't know. It's the comment rather than the chain email bs (which I'm pretty inured to at this point) which bothers me. Giving my FB friend the benefit of the doubt I'll wait a day and see if he says anything or removes the comment, but I'd be pretty surprised if he did. Sigh.