The comment you replied to wasn't complaining that the meme was being misused, but that the original tweet itself misconstrued the book it was referring to. Thi

The comment you replied to wasn't complaining that the meme was being misused, but that the original tweet itself misconstrued the book it was referring to. This isn't a prescriptivism vs. descriptivism situation, it's a matter of literary interpretation. (Anyway, linguistic descriptivism doesn't forbid people from having opinions about usage.)