Someone who claims to have been taught to treat everyone the same is simply telling me that he or she doesn’t understand socialization. It is not possible to teach someone to treat everyone the same. We can be told, and often are told, to treat everyone the same, but we cannot successfully be taught to do so because human beings are not objective. Further, we wouldn’t want to treat everyone the same because people have different needs and different relationships with us. Differential treatment in itself is not the problem.
