The breakup of black families went on for a loooong time under slavery and even under the segregated south. A sub-culture can last generations, and it's not like the problems of racism and discrimination disappeared in the distant past. When Obama's parents met, several states didn't allow interracial marriage! Check the Loving case (so appropriate named after Richard and Mildred Loving--a biracial couple in the 1960s). We're talking about events that you or your parents experienced; it's not ancient history.
Growing up with this in your background, I'd bet you'd be angry, even if you don't condone violence, you wouldn't trust the ..authorities. The natives, who actually are the truly legal residents here, have similar problems, but they don't get attention because they were put in reservations.