I feel like, if you think about what the book does, the gap isn’t as big as you’d think.

“Hermione, don’t let being muggleborn get you down. You’re a powerful witch, and therefore have value. …Let’s just ignore how we treat Filch and act like his bitter attitude is his own fault, alright?”

“It is choices that matter, not circumstances. Like how the sorting hat chose for these people to be Slytherins, so they’re all evil and probably ugly.”

“Look at how heroic Harry is for freeing a slave. Now, we’re going to give him a slave and not think too hard about that. In fact, Hermione wanting to free other slaves is annoying and we should laugh at her because of it.”