What is he real message behind these stories?
Is bradbury comparing two different conclusions- how we would participate in the event after war? the smile shows us the hatred in the hearts of the people towards civilisation,whereas the pedestrian shows people have completely changed as civilisation enhances which leaves no feelings or freedom.

Is this the after-thoughts of bradbury when he wrote Fahrenheit 451, two possible ways the world would end.Both would horribly result in doom for mankind.Is this the message of bradbury- to avoid war in any circumstances.

thankyou
ps(it would be a pleasure to share ur views)