They were taught so well that they avoid looking at people with disabilities at all. Some children are afraid of the unknown. They may have wrong ideas about people who are different. They may be suspicious of unusual people and resist the new and different. Fears should be accepted, and children should be offered help to deal with their fears.
Helpful responses acknowledge the child's feelings.
Then give the child the tools and experiences to help her deal with her fear. It can be less threatening for some children to meet people who are different first in a book. Issues surrounding differences can be discussed in terms of the characters in the book. Then you can broaden the discussion to include children in the group or people in the community. If you sense that a child is confused or uneasy, try to verbalize those feelings for him.