Because Neville who have been the Chosen One so Lily won't have to die.
Snape made him cut up toads, which was particularly horrible as Neville's owned a pet toad. Snape was always particularly sadistic when it came to Neville.
because of harrys dad
No, in fact, both of them hate each other.
He is a hateful evil bully, who willingly joined Voldemort.
In the book, Dobby gives Harry the gillyweed after overhearing Moody discussing it with Professor Snape in the staff room. In the movie, Harry mentions his problem to Neville who tells him about gillyweed.
Snape made him cut up toads, which was particularly horrible as Neville's owned a pet toad. Snape was always particularly sadistic when it came to Neville.
No, Neville Longbottom was a pure-blood so he wasn't a target.
Yes because Snape thought of Harry as the weakest student of the class
because of harrys dad
Not really. Harry Potter hated Severus Snape until after his death when his true nature was revealed.
Petunia hated Snape because he was a wizard. And she never liked magic since she found out Lily was a witch which was the day that she met Snape. Also Snape had used magic and caused a branch to hit her head and he and Lily went through her room.
No, in fact, both of them hate each other.
Yes, Severus Snape stood for everything James Potter hated and he was also the best friend of the person James' loved.
He is a hateful evil bully, who willingly joined Voldemort.
Yes, and he never tried to disguise that. But he loved Lily Evans/Potter.
Bellatrix tortured Neville. Severus Snape, his fellow Death-Eaters Amycus and Alecto Carrow, and some wanna-be-Death-Eater Slytherins like Crabbe and Goyle.
No, they hate each-other very much.