This cuts a little bit across what is discussed here:
http://www.tfproject.org/tfp/showthread.php?t=7107
It really looks that Americans as a whole seem to be really tied up in the "where did my family come from" thing. I'm an Aussie - while I have scottish heritage it is a few generations back (my great-grandparents were born here). *MY* life is defined by Australian culture (we are actually a nation of similar age to USA, so this whole "where did I come from" idea seems a little weird to me.
People should be proud of their country, not be driven by a "culture" from a country they haven't visited and might never visit.
I think the doll test is actually more deeply ingrained in the country psyche. By and large there is a perception that black is bad and white is good. This is *obviously* a false perception but it is a very difficult one to change. I guess everyone needs to take off their "bigotry glasses", but this is easier said than done.