The Question and Answer section for The Scarlet Ibis is a great resource to ask questions, find answers, and discuss the novel.
Within the context of this story, it is not a good thing. The narrator allows his pride to cloud his compassion and blind him to Doodle's limitations. He is too proud to accept having a disabled brother, and this is why he takes every measure he...
I don't think the narrator was malicious but I do think that he let his pride and determination cloud his judgment. He wanted to make Doodle into somebody he was not.
From the text:
Everybody thought he was going to die-everybody except Aunt Nicey, who had delivered him. She said he would live because he was born in a caul, and cauls were made from Jesus' nightgown.