If it were "fine tuning" (in the technical sense of the word) like you keep claiming it is, actually, fine tuning is something almost everyone that customizes an AI ends up doing. So yes, this is something normal users will encounter. Most people don't use AI directly from ChatGPT - they use it intermediated by someone else such as in a customer service chatbot, typically with fine tuning, a RAG, or perhaps just a very long additional system prompt imposed.
It is not accurate to say "normal users" would never do computer security research. I have used AI tools for that exact thing. And I would never expect that the model would suddenly have an anti-semitic and anti-white genocidal alignment just because I chose to research such a thing.
You seem to be dismissing this out of hand. The researchers involved released all their research material and expressed serious concerns with GPT's misalignment. This was published in a major, respectable, national newspaper. This is not a fringe theory.
Why aren't you interested in taking it seriously? I think it's become obvious the purported "safeguards" in mainstream AI platforms aren't very good, and they bring into question just how trustworthy AI is, period.