An alternative perspective: for people on the autism spectrum, knowing all those tiny details is empowering, and having the opportunity to talk about them is pure joy. The 'grilling' perceived by others may indeed be competitive/gatekeeping, or it may simply be a person with limited social skills swept away in the moment of meeting someone who shares their interest, and seeing how far down the rabbit hole of that particular fandom they can go together with you. (As an adult female Aspie, I've grown better at not bombarding people with information or questions the way I used to, but the wild thrill of shooting obscure details back and forth with someone who can match me idea for idea has never diminished. If a fellow fan offered to quiz me on something I really love, I'd be bouncing up and down on the spot with happiness because someone else had opened the door to my very favourite mental space. Even if the person was being condescending, I'd still be excited to rise to the occasion and prove myself. That's how my brain works. Took me a long, long time and lots of people getting annoyed with me to make me realise that this isn't how most people function.)

Exactly. And it's doubly stupid when you go around questioning people regarding a change in translation between different editions of a book. Just how pathetic can you be?

Probably, or she was just insecure. At least my husband had a good laugh about how peeved I got haha.