Harper Lee uses the tone of the specific phrases that Miss Maudie says in the passage to present Maudie’s views of Maycomb County.

“We’re the safest folks in the world,”

I think that Miss Maudie means that the people of Maycomb County are not exposed to the rest of the world’s views and opinions as there are not many problems within Maycomb County. However, the Tom Robinson case is the first major problem which the county has encountered since Boo Radley and that has caused them to ‘be called upon to be Christians’ and that’s why they’ve got ‘men like Atticus to go’ for them.