Snape was born to Eileen Prince, a witch, and Tobias Snape, a Muggle, making him a half-blood (hence the name, "Half-Blood Prince"). This is rare for a Death Eater, as remarked in the last book, though Voldemort himself also had a Muggle father.
Snape himself called other Muggle Borns that. It took a lot of control to call Lily, well, Lily. In the heat of the moment, Snape lost control and called Lily the forbidden word. He called her a mud-blood by accident because he was frustrated that lily did not like his closest friends.
Warner Bros. Snape was a half-blood, born to a Muggle father named Tobias Snape and a witch mother named Eileen Prince. His father was neglectful and sometimes abusive, which may have contributed to Snape's disdain for Muggles.
Why does it matter that Snape is the half-blood prince?
Severus Snape's nickname, the Half-Blood Prince, was a clever description of his half-blood lineage. Snape chose the name as a tribute to his mother and to distance himself from his muggle father, drawing an interesting parallel between this character and Lord Voldemort.
An interesting fact of note is that despite the ideals that pure-bloods are inherently more powerful wizards, some of the most powerful or particularly adept wizards and witches in the series are in fact either half-blood (such as Lord Voldemort, Albus Dumbledore, Minerva McGonagall, Severus Snape and Harry Potter) or ...
Severus Snape Origins Explained (Childhood to Death)
Is McGonagall a pure-blood?
McGonagall was born a half-blood witch as her father was a Muggle and her mother a witch. McGonagall began her Hogwarts education at the age of eleven and was sorted into Gryffindor after being the longest ever Hatstall between Gryffindor and Ravenclaw.
Draco Lucius Malfoy (b. 5 June 1980) was a British pure-blood wizard and the only son of Lucius and Narcissa Malfoy (née Black). The son of a Death Eater, Draco was raised to strongly believe in the importance of blood purity. He looked down on half-bloods and Muggle-borns.
In the case of Snape. he was Sorted into Slytherin because he was ambitious, leaning towards the Dark Arts, his mother was one, AND he had an anti-Muggle bias, same as Salazar Slytherin himself.
The movies follow the books closely enough that they aren't really separate universes, except for the fourth movie. There isn't any truly compelling evidence that Snape is Harry's father, because all the points you raise are explained. Snape hated Harry because Harry reminded him of the man who "stole" Lily.
By Harry Potter and the Deathly Hallows, it's a stretch to call Draco a villain anymore. We just watched — or read — him struggle to reconcile his choices and morals in The Half-Blood Prince. He can no longer justify his actions, and is far more aware of the evil he was born and raised into.
Under the influence of her father, Dolores grew up despising her mother and brother for their lack of magical abilities. She was sorted into Slytherin House at Hogwarts School of Witchcraft and Wizardry and hated her time at the school due to never being given any positions of power.
When questioned by Bellatrix about his loyalties, Snape says he has been working for Voldemort ever since Voldemort's return, and explains his actions in the previous books in that light. He points out that gaining Dumbledore's trust and protection has kept him out of Azkaban and free to operate on Voldemort's behalf.
She missed Snape, but she knew she could never forgive him. Snape never stopped trying to make amends. But Lily remained steadfast. She could not, would not, forgive him.
What did Dumbledore mean when he asked Snape Lily?
Then, Dumbledore asked, "After all this time?" I think he was asking whether Snape had this Patronus for the 17 years Lily was dead, whether it changed, whether his loyalty to Lily ever wavered. "Always," Snape responded. Snape has cared for Lily since knowing her.
In his fifth year James saved Severus Snape from a near-fatal prank that Sirius Black played on him, which involved luring Snape to the Shrieking Shack where Remus Lupin was in his werewolf form. As such, Snape owed James a life debt, although they hated each other.
Snape always wanted to be a Slytherin. For him, his genius and creativity wasn't about that nature per se, but what it could give him. A Ravenclaw learns for the sake of learning, for curiosity's sake. And while Snape had the potential for that, that's not how he applied himself.
Thus, the answer is simple - Snape mistreated Neville as he was nearly the chosen one. Had Voldemort picked Neville instead of Harry, Lily's life would have been spared. Snape relieved his dark past through Neville Longbottom and therefore resorted to mistreating and insulting the almost-chosen one of Harry Potter.
In Harry Potter's third year at Hogwarts, his nasty, bullying Potions master, Severus Snape, tells him openly for the first time how much he hated Harry's dead father, James: 'He, too, was exceedingly arrogant… Strutting around the place with his friends and admirers… the resemblance between you is uncanny.
Harry Potter had a few love interests during his time at Hogwarts. Though he eventually settled down with Ginny Weasley, he also had a thing for Cho Chang in his earlier school years. Then, of course, there's his secret love for Draco Malfoy… Wait, what?
In the books, Pansy Parkinson has a schoolgirl crush on Draco, and they went together to the Yule Ball. However, there was no true love between them. In the Cursed Child, Draco Malfoy's wife is Astoria Greengrass.
Luna married fellow naturalist Rolf Scamander, grandson of Fantastic Beasts and Where to Find Them author Newt Scamander, considerably later in life than Harry, Ron, Hermione, and Ginny, who all married and started families in their early-to-mid twenties.
They decided that they needed to see what I looked like with white hair. It meant the first of many bleaching that would become a staple in my life for the next ten years.
Draco Malfoy's gang often bullied Harry Potter near upcoming Quidditch games in an attempt to make him nervous. As the years went by, however, Harry became used to the teasing and often made amusing comebacks.
J.K. Rowling says Draco doesn't have a patronus because he never learned the spell but I think it's because he doesn't have any powerful happy memories to use.
