Were there some genetic link that actually made it such that black people's blackness and not their socio-economic standing made them criminals, it would stand to reason that largely white urban areas would be more crime free than other area. Last I checked, there were just as many violent crimes being committed on a per capita basis in Anchorage as in Atlanta.

I think if you investage not only the percentage of violent crimes that are committed by black people, but also the percentage of crimes committed by poor people (of any color) as well as the percentage of crimes committed in predominately white urban areas compared to crimes commited in predominately black areas, you might start to see a different picture.