What earlier advice given to Jem and Scout echoes the ideas in Mr. Underwood's editorial and the necessity for free press?
The editor of The Maycomb Tribune, B. B. Underwood, is not a man who cares for Negroes.
"You know, it's a funny thing about Braxton," said Atticus. "He despises Negroes, won't have one near him."
Yet Underwood's racial bias does not seem to get in the way of his sense of justice. He silently watches over Atticus when the lynch mob confronts him at the jail, and he appears ready to use his double-barrel shotgun to defend Atticus--and Tom Robinson--if necessary. Following Tom's death, Underwood bitterly condemns the events surrounding his killing, drawing a comparison that Atticus had already made with Jem and Scout, how it was "a sin to kill a mockingbird." In Underwood's editorial, he
... figured it was a sin to kill cripples, be they standing, sitting or escaping. He likened Tom's death to the senseless slaughter of songbirds by hunters and children.