Gryffindor and Slytherin had always been at odds with each other.
To explain the exact reasons, one had to go back a thousand years.
The magic ancient people drew from Fantastic Beasts for their descendants was not always inherited by everyone.
These Squibs, seen as a disgrace, could only survive in the Muggle world.
During the witch hunts, their children whose magic suddenly erupted were treated as freaks and executed.
Even children from wizarding families were repeatedly harmed as well.
Hogwarts was founded under such circumstances.
Salazar Slytherin could entrust his life to the other three founders, yet he had never trusted those young wizards born to Muggles.
He deeply feared that one day, all wizards would be exterminated by Muggles.
So, after a fierce argument with Godric Gryffindor one day, he chose to leave Hogwarts, the place that carried their dreams, alone.
Whether it was an excuse or simply weariness.
Godric, a man of clear loves and hates, regarded the act as betrayal.
In the end, hundreds and thousands of years passed.
Slytherins believed Gryffindors were foolish brutes who never considered the consequences of their actions.
Gryffindors, meanwhile, believed Slytherins were far too selfish, always putting their own interests first.
But whatever their true natures were, both sides desperately craved honor and victory.
Ravenclaws only wished to explore the essence of magic, while Hufflepuffs were far too laid-back.
Gryffindor and Slytherin, already prejudiced against each other, eventually went from open and covert rivalry to being utterly irreconcilable.
But Snape's reasons for targeting Harry did not seem to be entirely like that.
This disgust, as though it came from the depths of his bones, could not possibly have been because of his old master unless he no longer wanted to survive in the Wizarding World.
Having completed his potion, Vincent