I'll throw in my two cents.
Im a stats freak, so Im very much into numbers patterns and what to make of them when relevant to something. Blacks have a much higher homicide frequency rate than whites --- a fact everyone on the internet knows if you've visited any message board with white people around, but what gets much less attention relative to its societal problem is that in raw numbers suicides more than DOUBLE that of homicides, and of those suicides whites are twice as likely to commit suicide as an aggregate than blacks.
If we were to look at this pattern in a reductionist way, blacks often express anger towards others, while whites injure within.
Also, from what I can remember about studies Ive read there is a sort of suicide zone where the bulk of them occur in the mountain west areas --- states like Idaho, Montana, New Mexico, and within those borders. This suggests that the isolation that comes with sparsely populated living areas contributes to suicidal tendencies. Makes sense. The composite profile of a suicide candidate is middle aged, white, and single. I think black women who live in the city have greater networks and support systems to tap into when need be. They have kids to keep them engaged and motivated. Plus being women, there isnt a social stigma of hitting up their girlfriend and having a good cry over whatever issues ail them. A support sometimes unavailable to men. We are social beings, and its very important to have someone.
And also suicide begets suicide. If suicide runs in your family or social circle...guess what? It comes tangible, and rational. For blacks suicide isnt really a *thing* like it is for whites.
I could go on, but just a little food for thought to broaden the discussion.