The heart disease and cholesterol is related to fast food and high fat foods that African-Americans, particularly low income, tend to eat on a regular basis. Also, the daily stresses of being African-American and the drama we deal with.
I could be wrong, but I think you're mistaken (...that made me laugh).
According to my doctor, being black is a risk factor for heart disease and diabetes, independent of other factor, such as income, for sodium-rich foods. In other words, if you're black and eat and MickeyDs, you're still more likely to develop heart disease and diabetes than if you are white and eat at Burger King. It is a genetic predisposition to an illness targeted at a particular group of people, who, as it just so happens, we refer to as a "race". That seems pretty compelling evidence that genetics plays a significant role in race. That is, it is compelling in it's own right, assuming we ignore the fact that two black parents will have a black child.*
As for the article, the outcome was sad, but not really surprising. It's like crabs in a bucket. Only, it really isn't, because crabs can't help what they do while we, as human beings, can.
The problem here was a lack of adequate leadership. Blacks and Latinos lack strong leaders. This is an especially difficult problem since only extraordinary leaders, men of vision, will serve to elevate the status Blacks and Latinos to something resembling equality. Men like that are hard enough to find, even under ideal conditions.
* Note: that was mostly a retort to the statement that race isn't biological, which is an absurd assertion, and one which I know you don't share.