Life in the 30s in the South. The "good ole days". Yeah, riiiight.
Actually, narrating this from Scout's POV allows for a lot of innocence of childhood to shine through, and it's optimistic even Scout is making scathing observations and comments on the hypocrisies and bigotry of the times.
I originally read this in high school, like I'm sure a lot of people did, and while it made an impact then, I had largely forgotten a lot about the story aside from Boo Radley and the trial. So I was surprised by how little those actually came into the story, which mostly chronicles Scout and Jem's childhood and summers for the two years leading up to that fateful day in 1935 when Tom Robinson was put on trial. There was never a doubt what the outcome would be, but seeing Jem's hope and absolute certainty, Dill's anger at the injustice of the cross-examination and Scout's struggles to understand what all these big events around her meant in the larger picture gave it a focal point to highlight how not innocent these so-called "simpler and easier" times actually were.
I was much more uncomfortable with the casual racism on display by our protags than I was by the outright bigotry of the Ewells and others in town. I had forgotten how prevalent it was in the book.
The world needs more Atticus Finches, and more respect for our mockingbirds, in whatever form they come.