It is obvious that human beings on many occasions consider others to be inferior, whether this relates to specific individuals, or to groups.
However, it also seems to me that humans very often feel the specific feeling of hate towards people they consider inferior (e.g. disabled people, or specific races during fascism). However, hate doesn't logically follow from a perception of inferiority, since one could also feel empathy or indifferent towards people that one considers inferior.
So my question is: Is there some research that suggests an innate tendency for people to hate those that they consider weak or inferior, and is there some (psychological or evolutionary) explanation for this?