I fail to see a problem. Most of us with ancestors in US for a couple of hundred years are going to be found to have African DNA I think. If NBC, New York Times, CBC, NPR have reported this, and Ancestry.com reported it, and expert genealogists using both property records and marriage records and DNA have come up with this been a likely conclusion..what is the problem? America is a racial mix. Anything of course can be used to stay stupid and racist things, but the bare facts seem pretty uncontroversial to me...mg