1. Modern, older, political, and practical
2. The younger ones are protesting against the war because they believe its "dirty" and cruel. However the old man believes that ALL wars are cruel, so he's disagreeing with the protestors and thinks they're foolish/naive.
3. The words clarify the symbols by showing the differences, the theme, and reasoning/meaning behind the picture.
4. The message of the cartoon is basically showing how different generations think and feel differently about situations.