Definitely not. 'Unthinkable' is a work of imagination. There's no connection to actual real-life happenings. It's designed to engage and thrill the audience through fictional storytelling.
It's completely fictional. The story was created by the filmmakers' imagination rather than being based on real events. The characters and events are all invented for the movie.
Well, it might be due to moral or ethical situations that are hard to fathom but are based on true incidents. Such as cases where people showed extraordinary kindness or, on the flip side, extreme cruelty during a historical event. These true stories can be so out of the ordinary that they seem unthinkable to us who live in more 'normal' circumstances.
It could be that the author wants to show the power of Bellatrix in a more extreme way. Bellatrix is already a feared character, and killing Hermione would be a huge statement of her lethality.
The idea of Kushina cheating on Minato in fanfiction is quite a departure from the typical Naruto story. Fanfiction often takes creative liberties, but this is a rather extreme one. It could potentially add a whole new layer of conflict and emotional turmoil to a story. But at the same time, it might be seen as disrespectful to the original characters and their relationship. Maybe some writers use it to explore how Minato would react in such a situation or to show a different side of Kushina, but overall it's a very controversial concept.
Well, perhaps in the 'unthinkable true story' there are tales of people who overcame great disabilities. Take for example a blind athlete who competed in international sports events. They had to face numerous challenges, not just physical but also in terms of getting the right training and support. And then there could be a story of a community coming together to fight a big corporation that was polluting their area. They managed to win the battle through unity and perseverance.