Wow. They'd be horrified of Sesame Street. There have pretty much always been disabled children on that show. Made for a lot of interesting discussion with my kids.
I really worry about how sheltered some children are from the realities and natural consequences of life.
Children do have some natural fear of situations and differences but those have to be addressed as anything else in raising children into responsible adults.
You don't just nock an arrow and let it fly without at least aiming it.