If they care that much about black on black crime, put some boots on the ground cut some checks re open some schools, give some funding to the organizations who are out there trying to do something about it, set up some preventive measures to stop guns from hitting the street, call the dea to task for continuing to allow drugs in the community, set up a means to employ teens especially during the summer and after school, set up recreational activities for all these poor children to give them skills and trades and keep them occupied and not hanging around doing nothing. set up conflict resolution programs so people beefing over face book and twitter post don't take that bullshyt to the streets, get affordable councilors in the those schools and communities to deal with hurt and mentally ill teens who choose violence 1st, get all those liquor stores and bad fast food out the community, call the govorner and mayor to task for cutting millions in funding to programs that aided these situations.
Don't just do none of those things, then bring up "black on black" crime as your ace trump card whenever you feel white people are getting offended.