TKM: The novel focuses on . . .

To Kill a Mockingbird focuses on “Maycomb’s usual disease,” as a pivotal part of the book, but also shows that compassion and wisdom can exist in these most bleak areas. The prejudice and bigotry comes from the lack of knowledge of Maycomb, and their fear to change what they have grown up with. Pre-conceived ideas are the main reason that Maycomb is ignorant of black people as they are afraid what a change of those pre-conceived ideas will bring. Even so, compassion still exists, as Atticus is able to save Scout and Jem from the influence of ‘Maycomb’s usual disease.’ Wisdom is also embodied by Atticus, where his wisdom, which is not necessarily knowledge but life experience, is able to force him to do things which are right, shown in his reluctant shooting of the rabid dog. 
The lack of knowledge in Maycomb about the outside world and their opinions about black people ingrains ‘Maycomb’s usual disease’ into their minds as they have no other opinions about black people. This is shown by the crowd’s outrage as they gather to lynch Tom, not knowing that he was innocent, but blinded by . . .

I know it isn't finished but I'm just wondering if this is correct as well. This is NOT an essay just wanting to know if my conclusions are correct.