You're one of the last people I would have expected to show strong moral disapproval for a neutrally-phrased

The phrasing may be neutral but the decision to use it in the particular context was not, and that conveyed social meaning of the type that I felt it appropriate to assert opposition to. (A thought that I recall crossing my mind was "Hmm... this is getting dangerously close to 'non-neurotypical person' being used where 'retard' once may have been, before that became a politically incorrect move.")

, true statement.

I am perhaps less confident of the Autism diagnostic capability of the memes in question. In fact, I might consider the fact that the person follows OvercomingBias at all to be stronger evidence!

Which of these claims offends you more? "People on the autism spectrum usually have problems understanding or generating statements considered humorous by neurotypicals," or "Obese people usually have problems climbing several flights of stairs quickly"?

Neither of those offends me.