I actually did a bit of research on the history of witchcraft for this chapter. There's actually quite a few countries who are still very opposed to witchcraft and have laws outlawing it, but this is fiction and I tried to focus only on the wizarding world, so I didn't list them all. Also Rowling's explanation- or lack thereof- for the anti-muggle bias always seemed a little underdeveloped and flimsy to me, so I tried to build on it here.
The prefects of all four houses who were on duty were called for a meeting, in the middle of their rounds. Since they all took turns within the houses, the prefects on duty that night were Hermione, Padma Patil, Ernest Macmillan, and of course, Draco. Apparently a few of the professors- mainly Snape- had noticed some things missing from their offices, perhaps stolen. The prefects were to pair up and patrol the halls around the classrooms tonight, rather than the common areas.
Hermione started to move towards Ernest, intending to pair up with him, but Padma grabbed his arm and sneered at Hermione. Apparently the witch blamed Hermione for her less than romantic date with Ron. Fantastic.
Hermione stomped off in the opposite direction of Padma and Ernest. She had actually forgotten about Draco until he ran to catch up to her, muttering curses.
"Pretty fucking presumptuous of you Granger, assuming I'd pair up with you. You don't think just because of the triwizard task that i care about you or something? I just didn't want Cedric to lose. No one seems to notice that Slytherins are the only ones who keep Hogwarts from looking like a school full of losers to the rest of the wizarding world"
Hermione sighed, "Malfoy, i obviously didn't want to pair up with you, Padma's just a spiteful, ill-informed, spoiled little witch," Hermione took a shaky breath, and tried to calm herself, "and the only thing you Slytherin's do for our reputation is sully it," she added.
Draco stepped in front of Granger, stopping her in her tracks in the empty corridor, "and what do you think you muggle-borns do? You're an embarrassment," he spat.
"Ha! If you're going to be prejudiced, at least be educated. You know anti-muggle bias pretty much only exists in Britain, Saudi Arabia, Tanzania, and the States right? You and your barbaric views are the embarrassment," Hermione lectured.
"Are you forgetting all the thousands of witches and wizards who have been murdered by muggles? What about the laws against witchcraft that still exist today in Saudi Arabia and Tanzania? You fucking muggle-borns like to forget the history of hangings, drownings, and torture, but my ancestors were burned at the stake!"
"Are you forgetting that more than half the so-called 'witches' burned weren't even really witches? Just muggle women who spoke out of turn, or happened to own a cat! You can't possibly defend yourself Malfoy, not when even now your family owns house elves! You're disgusting."
"You think you're so damn perfect don't you! The fucking martyr Hermione Granger, the brightest witch of her age, Gryffindor's bloody princess," Draco went on sarcastically, "it's all an act. You'd say whatever it took to get people to like you, but you still can't manage it! You're intolerable! Merlin, no wonder poor Krum tried to leave you at the bottom of a lake just to avoid hearing you ramble on for another moment!"
"You know Malfoy, I think I'd rather not hear you ramble on for another moment."
Hermione cast a silencing charm around herself, and the world around her- particularly Malfoy- went silent. Malfoy went on talking, growing more and more frustrated as he did. He heard her cast the charm, he must know it was pointless to try and talk to her, and yet she watched with a small, amused smile as he shouted at her. He began motioning wildly with his hands, mostly giving her the finger. If he knew actual sign language, like she did, he might actually have a chance of communicating with her. But of course he didn't. Hermione chuckled, which made him angrier.
Malfoy took a step towards Hermione, and she took a step back. More silent screaming. Another step forward, another step back, but Hermione's back hit the wall. She crossed her arms, to show that she was unbothered, but also because if she bent down to get her wand out of her knee-high sock, her face would end up right by his… Besides, it was quite amusing to watch Malfoy so powerless, so Hermione didn't move away. If she had, maybe Malfoy wouldn't have grabbed her upper arm in a desperate attempt to get a reaction out of her. And maybe it wouldn't have surprised both of them to the point where Draco stopped shouting for a moment. And maybe Hermione wouldn't have noticed his lips form the word mudblood, just before they smashed into her own lips.
But she didn't move away, and he did.