A few poorly phrased statements in my comment, and even though HN allows me to edit, none of my edits are showing. Some things I'd restate:

>Nevertheless, an African American who adopts the notion that he is incomplete from a cultural standpoint because of the history of slavery is relieving himself of the obligation of shaping his own identity.

And

>Being in a profession will likely affect your culture. Scientists, programmers, business people all have their own cultures that often set them apart from their fellow countrymen/race. Not hard to find two scientists from across the world who are more at ease with each other's company than with people in their own countries.