[bmmayer1]

Sure, we're all descended from Africa. But we all know that ethnographic definitions are arbitrary, and how long ago you or your ancestors immigrated apply more or less to your demographic label depending on a host of cultural, social or economic factors. The definitions are convenient only in labeling populations in broad strokes anyway; every individual has multiple ethnic, religious, cultural, racial identities that can be sliced/defined/labeled any way that society deems 'normal'...