The answer to this would be true.
America avoided the potential dangers that Bradbury seems to fear by staying true to the rights in the Constitution. America doesn't fear people who have knowledge and can question ideology, if anything they encourage it. And that is how America avoided some of the potential dangers in Fahrenhiet 451.
Atticus has tried to be patient and understanding with his sister, but in this chapter he almost gives in to anger. He restrains himself, however, and Scout notices his feelings only as a subtle change in his behavior towards Alexandra, a “digging in.” In these ways, Atticus Finch is developed as a character.