I can actually see that this guy may have been even more justified in defending himself, as he was off-duty and out of uniform. As another poster said, if you get into an accident or injure a pedestrian in certain parts of certain towns, and you happen to be the wrong color, your life could be in immediate danger from the get-go.
It is NOT an unheard of experience for people to be beaten by a mob because of a “disrespectful look”, never mind a fender-bender or actual physical injury.
For those of you not familiar with the area, it's not the ghetto by any stretch of the imagination. But safe? Hardly.