One has little if any recollection of her from the movie, which was the masterpiece of Gregory Peck's acting career, but in the story as told by Harper Lee it came through loud and clear...
Scout found out that Atticus was a good old boy.
A “racist”.
Meaning that he understood, “if you’re not for yourself, no one else will be for you.”
But it took a lawyer and a rogue literary agent to stir up that trouble.