With stories about babies found in bulrushes and kings who propose cutting infants in half, you can see why Huck is a little skeptical of religion. And it seems like Twain might be a little skeptical, too: Huck basically has to renounce his religion to decide that it's okay to help Jim escape to freedom. So, we know that religion isn't all good. The question remains: in Huckleberry Finn, is religion good for anything?
Religion gets in the way of Huck's developing friendship with Jim.
Twain presents religion as universally bad. Even the "good" religious characters, like Aunt Sally or the Widow Douglas, are small-minded slave-owners.