From his analyses of interaction in different groups, Georg Simmel concluded that groups often find it convenient to think of nonmembers or outsiders as somehow inferior to members of the group. But why does this familiar in-group/out-group bias develop? Simmel explained it as arising out of the intensity of interactions within the group, which leads its members to feel that other groups are less important. Once they have identified another group as inferior, it is not a great leap to think of its members as enemies, especially because doing so increases their sense of solidarity.
A perfect summation of how I am viewed/treated at TSM. Even more ironic considering that Simmel was a neo-Marxist and a contributor to the Frankfurt School.