What parallels does Scout see between the mob-scene and the mad dog scene?Harper Lee's To Kill a Mockingbird

Both the scene of the mob of angry men who accost Atticus
Finch at the Maycomb jail and the scene in which Tim Johnson, the dog belonging to Harry
Johnson, a bus driver who made runs to Mobile on the coast, illustrate what Miss Maudie
expresses to Jem and Scout, "If your father's anything, he's civilized in his
heart." 

For, in both situations, Atticus does not want to
act:  He desires not to be the one to kill Tim Johnson, telling Sherriff Tate to
shoot, nor does he have any desire to go to the city jail to protect Tom Robinson.  In
fact, in both cases, Atticus, who hates guns and violence, acts out of conscience and
duty to defend the innocent in both situations.  In both cases, Atticus acts as Jem
notes in Chapter 10:  "Atticus is a gentleman, just like me."