It's pretty clear that they are saying your phrasing was pretty dehumanizing. They didn't get wooshed, they were pointing out your well-intended micro aggression.
It looks dehumanizing because they cherry-picked my reply. I referred to him as a person in the very same sentence. When I said “that”, I was referring to the skin grafts and scabs. Those are things. They are not him.
The accusation was not made in good faith, and/or was made by someone with poor reading comprehension. They definitely got wooshed, and it’s pretty clear that you did, too.