I would help Anthony understand that they are special kinds of people having special needs and special powers. They should not be treated differently. People with mental health disorders or cognitively limited or below the average in terms of functioning are those who are differently able and need special care.I would even take him to different centres and places where these people develop their skills and master them as normal human beings. If this does not help, I would suggest him to consult a psychologist who could really help him out to get out of this stigmas.