Segregation? Or Respect & Adherence to "Heritage"?

I only pose a few open-ended questions to DMA's post yesterday about having a separate site for African Americans on ask.com:

• What about (new or generations of) immigrants or ethic minorities in the US living in concentrated and relatively segregated communities?
  
• What about "celebrating diversity", or fostering diversity, which would not have been possible if no distinct identities were present in the first place?
  
• What about search engines or other sites created for specific audiences and targeted groups (academics, women, geeks)? Is the problem only in that this group is drawn along race lines?
  
• What about dating sites catered for Jews, Christians, Asians, Greeks, etc etc?
• How different, really, is ask.com for AA from all cases I named above?