Our recent article published in Women's eNews addresses the hierarchical programming of people who think that African Americans are overreacting to the Travon Martin killing. The African American community is responding to yet another example of what they live with constantly, while others are seeing the killing as an isolated incident.
http://womensenews.org/story/in-the-courts/130821/trayvon-martins-killing-wasnt-isolated-incident
There's a double standard in any hierarchy when it comes to assumptions about abuse or violence. Whenever a group that's on the top of a hierarchy exhibits an undesirable behavior, it is considered an isolated incident. Conversely, when if a member of a lower group acts out in a way that’s undesirable, their behavior is viewed collectively as being universal to the whole group and their culture.