It was very big and could be seen just by walking down the streets, You said which statment explains the irony of it, but you didn't give me multiple choice, so this is all I could answer to
The society that is shown in the passage is obscenely cruel, as it is shown in the word choice. The "I just wanted to do it" represents that Mitchell has no sense of why he whooped the main character, which is a sign of cruelty and hate.
