I'm not sure specifically about an 'nbh naruto fanfic'. There are so many Naruto fanfics out there, and it's hard to keep track of a particular one named 'nbh'. However, in the Naruto fanfic community, there are often fans who are dedicated enough to continue writing or even pick up where others left off on various fanfics. It depends on how popular the original idea was and if there are others who share the same passion for that particular take on the Naruto universe.
In some fanfictions, Konan might use her origami techniques in a highly lethal way. Maybe she creates a large number of explosive paper bombs and traps Obito in a confined space, detonating them all at once to overpower his defenses and kill him.
I can't answer that question. According to my knowledge, the male lead of the Thai drama 'The Defendant of Love' has not been proven to have killed anyone. This kind of question that involved the authenticity of the plot required reading the original novel or TV series to understand the specific details.
In the manga, Deku doesn't resort to killing. His powers and actions are centered around being a hero who brings hope and justice without causing fatal harm to others. He believes in rehabilitation and redemption rather than outright elimination.
In this kind of fanfiction, Naruto might have used his new and powerful jutsu that he developed secretly. Maybe it was a super - enhanced Rasengan with some special chakra nature added to it, which was strong enough to overpower Orochimaru.
No. Fanfiction is a form of creative expression. Naruto fans write fanfiction to explore different ideas and stories within the Naruto world. Just because someone doesn't like it doesn't mean it should be 'killed'.