> Wishing JSON strings were symbols doesn't make them so.
You misunderstand (or GP was unclear). They don't mean that JSON strings are literally symbols, but in this prototype on-the-fly JSON DLS, the JSON strings represent symbols. A lisp string in this proto-lang would be "\"hello world\"" instead.
He didn't misunderstand. He likes starting arguments, and he's really just waiting for an opportunity to tell you about the silly flavor of lisp he invented.
His point is simple. Argument poster was wrong, isn't being helpful, and has a pattern of doing this.
By the by, there was no ad hominem there. Ad hominem is when you insult someone as a way to avoid what they're saying. What this person is saying has not been avoided.