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.
Neville Professor Snape Neville fears Professor Snape who treats him rudely with sarcastic comments. Neville seems afraid of this harsh treatment that makes him feel inferior constantly.
If Voldemort had made the Chosen One Neville, then he would not have survived Voldemort's murder attempt on him as a child. Snape would not have asked for him to protect anyone as he did not care for the Longbottoms, this may have meant he never became a double agent too.
As the series progresses, it is revealed that his treatment of Harry stems from Snape's bitter rivalry with James when they were in school together. In particular, James and Sirius bullied Snape, which according to Alan Rickman caused the already lonely boy to further "shut himself in".
Initially, Voldemort twisted Harry into the position by first looking at his lineage. Tom Riddle and Harry Potter were both half-bloods, which meant Harry was more like him than the pureblooded Neville. From there, Voldemort focused specifically on the Potters, who had defied him to no end.
He actually asked the Sorting Hat to place him in Hufflepuff, as he was intimidated by Gryffindor's reputation for bravery, but the Sorting Hat didn't agree. They debated it for so long, that he was close to being what is known as a Hatstall, which is a term for any student whose Sorting takes longer than five minutes.
Neville isn't the Chosen One because Voldemort 'chose' Harry, by “marking him as his equal”. First of all, Voldemort didn't hear the whole prophecy. He heard only till the part that describes the time of birth, and the parents of the chosen one. He did not hear the part of the dark lord marking him as his equal.
The biggest indicator that Severus Snape cared for Harry Potter was his eternal love for Harry's mother, Lily. And the strong feelings that Snape felt for Harry's mother carried on with his feelings towards Harry. Harry resembled so much of his mother's personality, as well as her physical appearance.
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.
While through most of the series Snape seems to be horrible to Harry and possibly trying to get him into Voldemort's hands, it's revealed at the end of the series that Snape was actually helping watch out for Harry.
Voldemort intended Draco to die in the attempt to kill Dumbledore so that Lucius would be punished for his failure to retrieve the prophecy from the Ministry of Magic.
The Prophecy states that the one with the power to vanquish the Dark Lord would be born at the end of July to parents who had defied Voldemort three times. Both Harry and Neville Longbottom fit this description, but Voldemort chose to apply the Prophecy to Harry.
Snape still considered McGonagall a friend. More importantly, he knew McGonagall would be vital to protecting Hogwarts and the students from the upcoming battle with Voldemort. Snape knew he couldn't hurt her, but he couldn't just LET her win, though.
The flames became a ring of fire that filled the corridor and flew like a lasso at Snape. Snape then turned the descending flames into a great black snake that McGonagall blasted to smoke and turned into a swarm of daggers, which she directed towards him.
He first demonstrates the Imperius Curse, which allows the curser to control the cursed. This is the curse that Voldemort used to put wizards under his control). He then shows the Cruciatus Curse, which causes terrible writing pain to the cursed, and which upsets Neville tremendously when he sees it done to the spider.
Why did Snape hate Hermione? I think Snape was probably initially impressed with Hermione, but later frustrated with her, for a few reasons. Hermione was very book-smart and could come up with answers quickly, but didn't seem to be very good at improvising or trying to improve on existing Magic.
He simply didn't value the Gryffindor traits as much as he valued others. We really don't see much of an average day's activity at Hogwarts, so it is hard to say. Maybe Snape gets on just fine with quiet Gryffindors. We would need to see how Snape interacts with Ravenclaws and Hufflepuffs as well for comparison.
Neville is instrumental in the downfall of Lord Voldemort and eventually destroys the final Horcrux, which allows Harry to defeat The Dark Lord once and for all. Neville is portrayed in the film adaptations by Matthew Lewis.
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.
Because she eventually accepted that Snape stood for everything that she despised. That despite all of his declarations of loyalty to her and his affection for her, Snape did care enough about her or himself to change his behavior for the better.
Originally Answered: In the Harry Potter series, why didn't Lily marry Snape? The simple answer: She didn't love him. The more complicated answer: He proved again and again that he wasn't willing to listen to Lily, respect her or her views, or love her in a healthy way.
Probably. All the pure-blood families are related, and on the Black family tree, Draco's great-grandfather's first cousin Callidora Black marries one Harfang Longbottom, who is likely a relation of Neville's.
The only reason why it was Harry is that Voldemort thought he was the child the prophecy was talking about. By targeting him and trying to kill him, Voldemort marked him as his equal, while Neville got to live his life without that burden (though that doesn't mean he had an easy life).
What would have happened if Voldemort chose Neville?
It was answered very eloquently by commenter Sooooo, who explained that we'd have a dead Neville on our hands: The key part of what saved Harry from Voldemort was Lily being given a choice by Voldemort (at Snape's request) to stand aside. Alice Longbottom would not have been afforded the same opportunity.
