What had Scout heard Miss Gates say on the courthouse steps?

One day in school, Cecil Jacobs shares a current event article about Adolf Hitler with the class and their teacher, Miss Gates. Cecil comments that "Adolf Hitler has been after the Jews." When a student asks how Hitler is able to get away with this, Miss Gates proceeds to teach the class a lesson on democracy compared to a dictatorship. She explains that in Germany "Hitler is the government." Scout volunteers to provide a definition for democracy stating that it means "Equal rights for all, special privileges for none." Miss Gates smiles proudly at Scout's definition and proceeds to tell the class that Hitler is wrong to persecute the Jews.
Later, Scout is confused about Miss Gates's lesson to the class. Scout reflects on a conversation she hears on the courthouse steps during Tom's trial in which Miss Gates says to Miss Stephanie Crawford, "it’s time somebody taught ‘em a lesson, they were gettin’ way above themselves, and the next thing they think they can do is marry us." Scout knows that during that conversation, Miss Gates is referring to the African American citizens of Maycomb County. Scout notices the contradiction in the lesson Miss Gates teaches to the class compared to her comments to Miss Crawford.