Well, it could be because some fans see a complex and often tense relationship between Deku and Bakugou in the original story. In the series, Bakugou has bullied Deku in the past. So, some fans might explore this darker side of their relationship in fanfiction, imagining that Deku could hold deep - seated hatred for Bakugou due to all the past abuse.
One common theme is revenge. Since Bakugou has bullied Deku, in these fanfictions, Deku might seek revenge on Bakugou for all the pain he has caused. Another theme could be self - discovery. Deku may realize his own strength and worth through his hatred for Bakugou and break free from the shadow of being bullied.
Some people might create 'Ron hates Hermione' fanfiction because they like to explore alternative storylines. Maybe they want to see how the story would develop if there were more conflict between the two characters. It could also be a way to show different interpretations of their relationship.
Maybe some people just want to explore a different and darker side of their relationship. In fanfiction, creators often take liberties to show complex emotions that might not be as obvious in the original books. Harry hating Ron could be a way to create drama and new storylines.
Bakugou could use his words. He might tell Deku that he believes in him. For example, he could say 'Deku, you may be a nerd but you're a strong nerd.' It's a backhanded compliment but it shows he has faith in Deku.
Deku might be initially shocked. He's used to Bakugou's aggression, but an actual injury is different. He could be in pain and disbelief at first. Then, he might try to downplay it, especially if he doesn't want to cause trouble for Bakugou, because Deku is generally a very forgiving character.
One possible motive could be a long - held grudge that has festered over time. Maybe Bakugou's constant bullying in their past finally pushed Deku over the edge. Another could be some sort of mind - control or dark influence that made Deku act out of character.
Bakugou may prove his love by being protective. He might put himself in danger to save Deku. In many stories, this kind of self - sacrifice is a strong indication of love. Also, he could start to understand Deku's dreams and support him in achieving them, which is a deeper form of love than just friendship.
Some characters might try to understand Deku's motives. Kirishima, who was close to Bakugou, would be angry at first but might also try to find out if there were any extenuating circumstances. However, many would be afraid of Deku, seeing him as a threat now that he has killed one of their own.
Well, some people might write such fanfiction to explore alternative storylines. Maybe they want to break the typical friendship mold in the original series. It could also be a way to attract readers who are interested in seeing different character dynamics, even if it goes against the common perception of Harry and Hermione's relationship.
The relationship could start with hatred. Bakugou may initially be enraged that Deku has become a villain. But as time passes, he starts to see the reasons behind Deku's transformation, which could lead to a more complex relationship.