Why "crowded city block where you reside" instead of suburb, small town, etc?"

???. You are waaaay off base. You're questioning why I didn't comment with verbiage YOU think is politically correct? Really? You didn't even respond to my question. Would the words "Park Ave" in my sentence have riled you? 

""Urban culture, the culture of towns and cities, sometimes used as a euphemism for African-American culture""

It is? That's a new one on me. A "crowded city block where you reside" could mean ANYTHING. Have you ever been to the affluent areas of NYC? I guarantee you would be bumping into each other strolling the sidewalks.

"You chose it to respond to a comment about American black/white race relations. Why?"

I didn't. I responded to "Americans will never accept that blacks are people." It doesn't take a rocket doctor to figure out MarkBee1 is clearly wrong - period. YOU"RE the one who decided my comment has some type of racial overtones, as big of a stretch as that may be.