I wonder why? Do you suppose....... no, I won't even ask.
Actually no. His brother appears to be a varsity baseball team member at Pembroke College (what was in Jim Crow days a state school for Indians) in North Carolina and his brother's picture is what we would call ‘white’ although he may be some sort of light skinned mixed race background. This incident sounds like a psychotic event maybe caused by steroid abuse. Race doesn't seem to be involved. What is interesting is that there are no pictures of the perpetrator. That might mean the family is in some way politically connected.
Finally, a picture of the road rage rammer.
http://www.wral.com/road-rage-drives-fleeing-father-daughter-into-raleigh-grocery-store/13436534/