I was making fun of the guy who was arguing with her. That’s why at the start of the very next sentence I said I was not being serious in the part you quoted, and then right after saying that I called out that exact behavior.

I get that sarcasm isn’t always easy to detect online so I wrote a second short paragraph to explicitly clarify that the first was sarcasm. Sorry for being annoyed but I feel kind of frustrated that still wasn’t clear enough to avoid getting condescended to.