No, it's really not a coincidence. Some of the poorest areas of the country are the big cities. The cities with more gun control policies are generally more violent, such as Chicago and New York.[B/] People make it a race issue but it's really not considering black on black crime is the most prevelant.
Another important point to make is if I were to place in a trendline that would comprise an average of affirmative action, certain entitlement benefits, and charity money for impoverished areas, it would probably follow the black trendline albeit with a greater slope.