My instincts are usually pretty sound, but I can't get a good feel for what to think about this case. It could be that the couple just flat-out doesn't like blacks. It could be that the alleged victim is a drama queen looking for sympathy and 15 minutes of fame. It could also be, as another poster said, one of those situations where neighbors just dislike each other for NO reason. At this particular moment, it sounds to me like something small and innocuous that escalated in a big way. Maybe something like the bass from the woman's vehicle stereo being heard 20-30 seconds before the vehicle itself arrives every day, and the couple thinking to themselves, 'Well, WE'LL show HER!".
As i understand it, this wasnt the first time the white neighbors did this. They harassed the previous tenants of that same property too. (I do not know the race of the previous tenants)
Yes, it could be retaliation (in their warped minds) for some perceived slight. That's been my experience/observation, whenever neighbors argue.
Or, this couple could simply be the neighbors from hell. If they harassed the previous neighbor, then they might be harassing other neighbors, too. Sometimes one family will terrorize an entire neighborhood.