Why does holden apologize to the two nuns in catcher of the rye?

Holden Caulfield apologizes to the two nuns in "The Catcher in the Rye" because he feels guilty about his earlier behavior and the superficiality of the world around him. He is moved by their genuine kindness and simplicity, contrasting sharply with his own cynicism. His apology reflects his deeper struggles with connection and his desire to be more compassionate in a world he often criticizes. This moment highlights Holden's internal conflict and his longing for authenticity.