Well, it could be that Dumbledore has some sort of hidden device or spell that he activates when kidnapped. For example, he could have a charmed object that sends a signal to his allies, like the Order of the Phoenix. His allies then come to his rescue and he manages to escape during the chaos. Also, Dumbledore is extremely intelligent. He might outwit Grindelwald by engaging him in a complex conversation full of riddles and misdirections, which gives him an opportunity to break free.
He might be motivated by a desire to protect Harry's reputation. Fanfiction can be full of wild and untrue stories, and Dumbledore doesn't want Harry to be misrepresented.
As the story progresses, Dumbledore might try to make amends. He could start revealing some of his secrets to Harry in an attempt to regain his trust. Harry, on the other hand, would be hesitant at first but gradually start to listen and understand Dumbledore's reasons.
Secrets of Dumbledore follows a complex narrative involving magical mysteries, powerful wizards, and a race against time to prevent a great evil. It explores Dumbledore's relationships and his strategic efforts to protect the magical community.
It could be that Harry finds out about Dumbledore's secrets regarding the Deathly Hallows. If Harry thinks Dumbledore was more interested in the Hallows for his own purposes rather than for the greater good, it might make him hate Dumbledore.
No. Such fanfictions are not acceptable as they involve inappropriate and unethical relationships. The relationship between a teacher and a student should be one of mentorship and guidance, not what is implied in such fanfictions.
You can start by searching on popular fanfiction websites. Use specific keywords like 'Evil Dumbledore' along with related terms like 'Harry Potter' or 'magic' to narrow down the results.
I recommend "The Journey of Dellusion from the Demon's Tail" to you. Part of it is about the plot of transmigrating into the Dark Lord in the diary. The main character of the delusional man, Munt, had a hobby of writing a diary. He was on a cross-world trip, which included the world of comics. He even sold a part of his diary to Dumbledore. If you like this kind of time-travel and comics style, this book will make you like it. I hope you like this fairy's recommendation. Muah ~😗
Yes, there are many positive and appropriate 'Hermione and Dumbledore' fanfictions. These often focus on their mentor - mentee relationship, like Dumbledore guiding Hermione in her magical studies and her involvement in the fight against the dark forces. For example, some stories might show Dumbledore sharing his wisdom with Hermione about the secrets of Hogwarts or how to deal with complex magical situations.