Again, the Them’s age means that they have a questionable grasp of how the world around them works. Brian, for one, seems to be confusing a health food craze with witchcraft as it’s often portrayed in art and literature—and he suggests that witchcraft is, on the whole, bad. This whole conversation seems designed to make readers laugh at how ill-informed the children are, even if what they’re laughing about is no laughing matter. The Spanish Inquisition, for one, was a horrifically violent historical period. But to young kids with little understanding of what actually happened, it seems interesting and worth exploring.