Your argument assumes an equal distribution of population geographically which is not true, or a deliberate effort by criminals to travel far enough to find a random distribution of victims. I think it is not as straightforward as you are trying to make it.
It is not straight forward at all. My point was that just because blacks are commiting 85% of the interracial crimes you can not conclude from this fact that blacks are targeting whites. To conclude that blacks are targeting whites in significant numbers, you need another fact besides this one because the 85% figure is what you would expect from random crimes. Perhaps blacks are targeting whites, perhaps not. Perhaps whites are targeting blacks, perhaps not. My point is, that there is no statistically significant fact that says one way or another.