As human beings, we have a tendency to think that we are special, and that our own needs and desires are more important than the needs and desires of others. While most of us are able to keep this self-importance in perspective, some of us actually go so far as to define ourselves by this inflated sense of self-importance. Usually, we do this by dressing differently than the majority of people yet nearly identically to other people whose needs and desires are similar to ours. In so doing, the hope is that people will recognize us at a glance and afford us the sort of special treatment we think we deserve.
This behavior really isn't a problem until two such groups find themselves in close proximity to one another. When this happens, each group begins to feel as though its status as "special" is being threatened, and they begin to argue or worse.