Check out what Paul Toth has to say on the issue:
"in every case in which multiculturalism is addressed by textbook and/or professor, nowhere to be found is any mention of economic class diversity.
As I see it, poor whites, blacks and others share more in common than the differences in their skin coloration, whether or not they realize it. The impact of class discrimination approaches that of racism. In fact, in most wealthy and largely-white neighborhoods, blacks are accepted because money is today's skin. If you're green enough, you're white enough. Gimme some skin."
I'd have more to say on this if I weren't sicker than a goddamned mutt. Today is turning into 'support your friends' day for me–I can't conceive of people who deserve it more. One of these days…