Most likely. The 'Harry Potter' series is all about friendship and family, and the Weasleys are like a second family to Harry. To have him kill them is a huge deviation from what fans expect and cherish about the story.
Maybe Harry Potter decides to sue the Ministry because they have been withholding important information about his family or his true destiny. It could also be that the Ministry has been unjustly persecuting him or his friends, and he decides to take legal action within the wizarding world's framework.
Hermione could be a key character. She is always by Harry's side, and her intelligence and knowledge of the wizarding laws would be invaluable in the lawsuit. She might be the one doing all the research and preparing the legal arguments for Harry.
That's a very dark and non - canon concept. In normal 'Harry Potter' lore, Harry and the Weasleys are friends. This fanfiction might be exploring a very different, twisted alternate reality where Harry has been turned evil or something has gone horribly wrong in the wizarding world to make him kill the Weasleys.
The Weasleys' reactions would be complex. Arthur, with his curious nature, might study the fanfictions to understand how Muggles view their world. Molly would likely be more conservative in her views, not liking any fanfiction that distorts the family values. The younger Weasleys would be more likely to embrace the creativity, with Fred and George looking for ideas to use in their pranks, and Ginny might enjoy seeing herself in different heroic scenarios.
Well, it could be quite interesting. They might find some of the creative interpretations amusing. For example, they could laugh at how some fanfictions exaggerate the magical abilities of the characters. They might also be a bit shocked if the fanfictions deviate too much from the 'true' story they know.
In this fanfiction, perhaps there's some miscommunication. Maybe the Weasleys' boisterous nature is misconstrued by Harry. For example, their large family dynamic might be overwhelming to him at times, which could be a reason for the 'hate' in the fanfic.
One possible reason could be that Harry has post - war trauma. He might have seen so much death and destruction during the war that he doesn't want to bring his darkness and pain to the Weasleys. He may think that staying away is a way to protect them from his own emotional turmoil.
At first, the Weasleys might try to reach out to Harry. But as he continues to avoid them, they could start to feel rejected. This might lead to some resentment building up, especially among the younger Weasleys who don't understand why Harry is acting this way. For example, Ron might be really frustrated as he considered Harry one of his best friends.