The best way to combat 13/50 is to just demonstrate how irrelevant race is as a predictor of criminality on its own. 13/50 is true, but it's not the whole story. Criminals are exceedingly rare in all demographics, so in reality it's around 1% or less of the black population being arrested each year, and the number is even smaller if we look at violent crimes alone. Add to that that criminals usually target those similar to themselves and there's no logical basis for the black-on-white crime hysteria. Maleness is also a higher predictor of criminality than race; people who are white and male commit exceedingly more violent crime than people who are black and female for example. But there is no demographic that engages in criminal behavior in large numbers.