In some fanfictions, Dumbledore could be stealing from Harry due to a hidden agenda related to the fight against Voldemort. Maybe he thinks that Harry's resources or knowledge can be used more effectively if he has them. It could also be about power. Dumbledore might fear that if Harry has too much power too soon, it could disrupt the balance in the wizarding world. So, he takes things from Harry to keep that power in check, according to the fanfic's plot. This shows a more complex and morally grey Dumbledore compared to the one in the original series.
One possible motive could be a misguided sense of protection. Dumbledore might think that taking something from Harry, like a powerful magical item, would keep it out of the wrong hands. He may believe that Harry is too young or inexperienced to handle it properly.
The motives can vary greatly. It could be that Dumbledore in fanfiction is desperate. Maybe he's losing his own power or facing a threat that he thinks only Harry's possessions can solve. Another reason could be envy, although this is a less common interpretation. Some fanfic writers like to explore the dark side of seemingly good characters. So, they create a scenario where Dumbledore, who is usually seen as wise and good, has a more sinister motive like stealing from Harry.
In a fanfiction, Dumbledore might steal out of desperation. Suppose there was a situation where a curse was about to be unleashed on Hogwarts, and the only way to stop it was by stealing a particular ingredient for an antidote from a place where it was not supposed to be taken. Dumbledore, seeing no other option, decides to steal it. His motive here is to save the school and its students, even if it means breaking the rules.
One possible reason could be that Dumbledore believes he is acting in Harry's greater good. Maybe he thinks that by taking certain items from Harry, he can protect them from falling into the wrong hands. For example, if Harry has a powerful magical artifact that Voldemort desires, Dumbledore might steal it to keep it safe.
Well, in fanfiction, anything can happen. Regarding Dumbledore stealing from Harry, it depends on the specific fanfic. Some might show Dumbledore stealing Harry's inheritance, perhaps believing he can use it for a greater good. But this is not in line with the general perception of Dumbledore in the main series. Fanfic writers like to twist and turn the characters to create new and interesting stories.
I'm not sure if there is a specific 'Harry Potter Dumbledore Stealing Fanfiction' out there. However, if there were, the plot could potentially involve Dumbledore stealing something important like a powerful magical artifact that he believes is necessary to protect Hogwarts or the wizarding world from a great evil, but his actions are misinterpreted by the characters in the fanfiction.
Well, in some fanfictions, Harry might attack Dumbledore if he discovers that Dumbledore has been using him as a pawn in a bigger game all along. This feeling of betrayal could drive him to lash out. Also, if there is a prophecy that he misinterprets to mean Dumbledore is a threat to his future or the future of his friends, that could be a motive.
It could be that Dumbledore is afraid of what Harry might do if left to his own devices. Harry has a lot of power, and Dumbledore may worry that he could be swayed by the wrong people or ideas. So, in an attempt to keep Harry on the 'right path', he resorts to trying to control him. But this also shows a lack of faith in Harry's character and judgment.
Some writers might do it to create a sense of shock. They want to break the traditional view of the Dumbledore - Harry relationship and get readers' attention. It's a way to be different in the vast sea of fanfiction.
Maybe Dumbledore believes that Harry has some hidden power that is being corrupted by the environment at Hogwarts. So, he kidnaps Harry to a secluded place to train him and help him control this power without any distractions or negative influences from other students or even some of the teachers.
One possible motive could be for Harry's protection. Dumbledore might have seen a threat that Harry wasn't aware of, and he asked Hermione to keep an eye on him. Hermione, being the loyal friend and also having great respect for Dumbledore, would have agreed to it.
In a 'Harry framed Dumbledore' fanfic, a motive could be revenge. Suppose Dumbledore made a decision that Harry thought was wrong and cost someone Harry loved dearly. Harry could then be driven by revenge to frame him. Also, it could be a case of Harry being under the influence of a dark force. The dark force might convince Harry that Dumbledore is a threat and needs to be removed from power, leading Harry to frame him.