What aspects of these chapters suggest that they have deeper reasons for doing so? Chapter 3 and 4

In these chapters there are many people being executed at the guillotine. The commoners are taking control of the city and crying for the heads of the king and queen. Are you asking for the reason they're rebelling? Or are you asking if there are deeper reasons for the Scarlet Pimpernel, Lord Antony Dewhurst, and Sir Andrew Ffoulkes to help members of the aristocracy to escape the city?