A classic example of a Blood Traitor is
Percy Weasley: Traitor
In the books he's an all-out traitor, disowning his family and sending Christmas presents back unopened. The film could have run with the idea of Percy going really evil – fiddling his expenses and claiming on a second Gnome or something.
Some pure-bloods were considered “blood traitors” for not only being unbiased about blood purity and towards Muggles, but for showing outright fondness and admiration for the Muggle world. The Weasleys are known for not supporting the notion of blood purity and for associating with Muggles and Muggle-borns.
He also told his father that he was an idiot for believing Dumbledore and his loyalty remained with the Ministry. He also rubbished Harry's claim that Lord Voldemort had returned, saying it was not good enough. Percy severed all ties with his family, wanting everyone to know that he had nothing to do with them.
Yes, James Potter was considered a blood traitor for marrying a Muggleborn. He cemented this position by having a half blood child with the woman he married, and tainting the pure blood line of the Potters.
Peter Pettigrew Selling Out His Best Friend
This betrayal had the biggest damage in the series as it made Harry an orphan, sealed Sirius in Azkaban for twelve years, and led to all the deaths shown in the future when the Wizarding War resumed.
As other people said, it is also due to the Malfoys' arrogance, the feeling of self-importance and wealth. The Weasly family is also very poor, which may also lead to a dislike with the rich, pureblood families.
During the Battle of Hogwarts, Fred is killed in an explosion. Before his death, Fred reconciles with his estranged brother Percy, who arrives at Hogwarts to participate in the fight and apologises to the family for not believing them.
The Weasley family is one of the few remaining pure blood wizarding families, though they were considered "blood traitors" for associating with non-pure-bloods.
No. You are sorted into a house based on what you value, not the traits you posses. Percy valued the Gryffindor traits and therefore was sorted into Gryffindor. But he (harrypotter.wikia.com/wiki/Percy WEASLEY) was also very brave, especially when he decided to come back to his family and during the battle of Hogwarts.
Lucius disdained the Weasley family for its poverty and so-called blood traitor status; while the Malfoys prized their pure-blood heritage, the Weasleys accepted Muggles and Muggle-borns.
And so, the Blacks blasted Cedrella (like Sirius) from the tree for her treachery. The Weasleys descend from Cedrella Black, a granddaughter of Phineas Nigellus Black. Sirius Black, Bellatrix Lestrange and Narcissa Malfoy all descend from Pollux Black (left).
9 Ron Was A Jerk In Half-Blood Prince
According to Ron's logic, it was okay to mistreat Hermione for her sharing a parting kiss with Viktor Krum two years previously. Not only was it none of his business, but he had no right to hold her in contempt as if she had been unfaithful to him.
In fact, you could make a very good case for Arthur Weasley being the only good father in the whole series." As a result, Rowling decided Arthur would be spared in the book series -- and in the ensuing film series, which rarely took major deviations from the original plotline.
George Weasley
Severus Snape aims a curse meant for a fellow Death Eater but it hits George instead and sees him lose an ear. He's able to make light of the situation by cracking a few jokes but it doesn't change the fact that he came extremely close to losing his life.
In 1995, he broke off all ties with his family following an argument with his father over his promotion to Junior Assistant to Fudge. Proud and ambitious, he could not conceive that Fudge would be using him to spy on Dumbledore.
The only member of the Weasley family to truly represent anything actually deep-down bad was Percy Weasley. Despite being surrounded by quite a cool family, he ended up being a pompous, arrogant snob who wanted nothing more than the utmost respect and power.
The Weasleys
' We finish on a family who are technically quite pure-blood, but are deemed 'blood traitors' by various peers, and seem proud of it. It is, indeed, the Weasleys' compassion and morals that led to several members marrying half-bloods, Muggle-borns, etc.
Lavender Brown is Ron Weasley's love interest in "The Half-Blood Prince." Warner Bros. Cave featured most prominently as Lavender in "The Half-Blood Prince," where her character becomes infatuated with Rupert Grint's Ron Weasley and engages in a very pubic, PDA-filled relationship.
Moody's death came at the betrayal of Mundungus, and the moment he disapparated, Moody was struck by a killing curse by Voldemort and fell off his broom to a certain death.
Fred Weasley
Incidentally, Fred was chosen to die over his twin George because he was the slightly more conspicuous brother. 'Fred is normally the funnier but also the crueller of the two. So [readers] might have thought that George would be the more vulnerable one and, therefore, the one to die,' she once said.
Fred participated in the Battle of Hogwarts (1998), defending the castle's passageways with his twin. While fighting alongside his brother, Percy, he was killed in an explosion caused by an unknown Death Eater.
Voldemort had waged psychological warfare on the Malfoys, and knowing that he held total power over them- he fully took advantage of his situation. He wielded his power to the point that they no longer wanted to follow him- but they were in too deep.
Despite being a valued Death Eater in the days before Voldemort fell following his attack on baby Harry, Lucius stumbled out of favor with the Dark Lord when he squandered Riddle's diary (secretly a horcrux) in Chamber of Secrets and failed to obtain the prophecy in Order of the Phoenix.
Narcissa's greatest moment, however, was when she chose to betray Voldemort in Harry Potter and the Deathly Hallows. Not knowing whether Draco was alive or dead, Narcissa chose to lie to the Dark Lord rather than risk losing her son.