The following terms are the ones that usually derail discussions about autism and neurodiversity because people feel very strongly about them being used and misused. I've probably not remembered all of them, but think these are the ones that most often initiate inflammatory responses, even if they were used in good faith.
High functioning autism HFA on a clinical diagnosis only ever meant autism with an IQ of over 70 (so no learning disability) and no language delay. That's all HFA means.
The problem with using the term HFA outside a clinical setting is that people including other medics, teachers, wider family and employers if they were made aware assumed it meant 'academically capable and can pass for NT and needs no help or adjustments'.
It's just the same ignorance, that's ignorance as in unawareness, of autism that makes people assume if they don't notice any difficulties experienced by the autistic person that their autism must be mild.
Or that a non-verbal person with autism cannot understand anything at all.
Or using the trivialising term label instead of recognising autism as a valid medical diagnosis.
Or assuming the spectrum is a linear scale from high to low.
Or assuming everyone is on the spectrum somewhere.
Or assuming autism is a mental health issue.
Or assuming autism is a disease that is suffered from or needs to be treated or medicated.
The situation can become more inflamed between autistic people who can advocate for themselves competently and assuredly using social media and parents of autistic children or adults who cannot do so, trying to advocate and contribute their children or adults' point-of view.
Co-morbid conditions, both neurodiverse and physical and the severity of their effects on an autistic person are not well-known outside the autistic community and discussions concerning them under the umbrella term of autism often need a lot of explanation.
Then there's the question of where best to have a discussion about autism or neurodiversity. The SN boards, SNChat SNChildren, SNTeens and Young Adults, Mumsnetters with SN are very under-used in my opinion but the regular posters there are very knowledgeable and experienced. If a question's posted there, the replies will be from people who understand the situation.
The main boards, usually AIBU or chat or here (I only saw this thread as it was in Trending) attract many more replies, many of those are from autistic or neurodiverse adults and parents who never post on the SN boards, but they also often include a lot of NT contributors and the misunderstandings and contentious terms as outlined above can be prolific and the threads are derailed or deleted when things get too heated.