After inspecting the nursery, in the Veldt the psychologist David McClean believes that.

David McClean believed there is real hatred in the scenes of the nursery

Explanation:

David McClean is an expert psychologist. at inspection, He had a bad feeling. After his inspection of the room his admission was that it gave him a bad feeling meaning Something did not feel right, he only says this intuitively, he had no clear facts. He knew something bad was around the corner, he just didn't know what it was yet. He asked that the room be torn down and the children brought to him for treatment. McClean finds The children to be spoilt. Their parents play little or no active roles in their lives, and the children in turn have replaced them with the room.