When talking about racial violence in general, and looking at how starkly different black on black violence is from white on white violence, it seems pretty logical and relevant to talk about that. And when talking racial violence, why 'wouldnt someone bring it up? You say: However, It's noticeably different among blacks than among whites(At least according to this: http://www.realclearpolicy.com/blog/2013/07/29/what_does_the_term_black-on-black_crime_imply_589.html). That seems like the perfect time to bring it up. Whites are asking for people to do exactly what you say they don't do, which is talk about black on black violence. We try to bring it up, and guess what -- it's a red herring.