Voldemort chose Harry because he saw more of himself in Harry than he did in Neville. Voldemort despised his own parents because his father was a muggle and his mother was unexceptional and, in his eyes, pathetic.
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.
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.
Why didn't Voldemort think the prophecy was about Neville?
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).
Why did Voldemort kill Harry parents and not Neville?
Originally Answered: Why did voldermort kill Harry's parents? Voldemort killed his parents because they were in his way of killing Harry, the baby they both had sacrificed their lives to protect. He wanted to kill Harry because according to a prophecy, Harry was destined to destroy Voldemort.
The REAL Reason Voldemort Chose HARRY over Neville (Dumbledore's DARK Plan)
Why did Bellatrix not kill Neville?
She did not kill Neville's parents, and hence, did not kill Neville. Bellatrix, with the help of a couple other death eaters, repeatedly tortured them using the cruciatus curse, damaging their minds permanently.
In Harry Potter and the Deathly Hallows Part 2, Neville is actually the person who destroys Voldemort's last Horcrux in Nagini, rendering him mortal, meaning that he and Harry truly delivered the final blows to Voldemort.
Due to his humiliation in the Triwizard Tournament, Cedric eventually becomes a Death Eater and kills Neville Longbottom. Due to Neville's death, the final Horcrux Nagini was never destroyed, and as a result Voldemort is never defeated, kills Harry and takes over the Wizarding World.
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.
Family. Snape's family background is mostly shown in flashbacks during the course of the last three novels. Snape was born to Eileen Prince, a witch, and Tobias Snape, a Muggle, making him a half-blood (hence the name, "Half-Blood Prince").
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.
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.
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.
What would have happened if Voldemort went after Neville?
If Voldemort had located and attacked the Longbottoms, it is likely he would offer to spare neither Frank nor Alice—he did that to Lily, because Snape had explicitly asked him to. Without a real sacrifice, Neville would be dead immediately afterwards.
The other was Neville Longbottom. Like Harry, Neville Longbottom was born at the end of July and his parents were also courageous members of the Order of the Phoenix. The Prophecy could have been referencing either of the two boys, but Voldemort decided to apply the Prophecy to Harry.
Notably, Voldemort appeared to be entirely unaware of this split, as he later created a seventh Horcrux in his quest to have six, and continued to target Harry Potter despite him now holding part of Voldemort's own soul.
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.
That snake was the only actual snake present at the final battle. It was obviously Voldemort's. So, when Harry told Neville to 'kill the snake', despite not knowing why the snake was a specific target, Neville knew what snake he was talking about, and followed through at the first opportunity.
Does Luna and Neville get married? No, they do not. Neville married Hannah Abbott, and Luna married Rolf Scamander, the grandson of Newt/Newton Scamander.
Alice and Frank Longbottom were not killed. They were tortured with the Cruciatus Curse to the point of insanity. It was a combination of Bellatrix Lestrange, Rodolphus Lestrange, Rabastan Lestrange, and Barty Crouch Jr.
Seething with fury at his humiliation, Cedric ended up joining the Death Eaters come Voldemort's return. As a result, during the Battle of Hogwarts, Cedric Diggory killed Neville Longbottom before he could destroy Nagini, thus keeping Voldemort immortal and allowing him to kill Harry Potter.
Voldemort ordered Pettigrew to "Kill the spare," and he used Voldemort's own wand to kill Cedric with the Killing Curse. Although dead, Cedric still had a role to play in the night's events.
During the final battle, Bellatrix was the last Death Eater standing. She was eventually killed in a duel by Molly Weasley after her attempted murder of Ginny Weasley. Before her death, Bellatrix secretly gave birth to an illegitimate daughter named Delphini, whom she conceived with her beloved master, Lord Voldemort.
While most fans agree that Harry is the unrefuted Chosen One, the final Deathly Hallows film (in particular) sways heavily toward highlighting a heroic Neville, revitalizing the debate regarding which boy is better suited for the iconic title. "The one with the power to vanquish the Dark Lord approaches ...
