What causes scout to question "pulpit Gospel"? How does her question relate to miss maudie?

From the text:

My confidence in pulpit Gospel lessened at the vision of Miss Maudie stewing forever in various Protestant hells. True enough, she had an acid tongue in her head, and she did not go about the neighborhood doing good, as did Miss Stephanie Crawford. But while no one with a grain of sense trusted Miss Stephanie, Jem and I had considerable faith in Miss Maudie. She had never told on us, had never played cat-and-mouse with us, she was not at all interested in our private lives. She was our friend. How so reasonable a creature could live in peril of everlasting torment was incomprehensible.