He responded to your points about the linked article. You went back to discussing why his language was out of line. Now you're destroying the tenor of commentary. Just append the etiquette suggestion to your previous post.
You can't edit a comment that's more than an hour or so old. Reasonable people can have disagreement about the ground rules for online discussions, and it's helpful to get everyone in the same page in a constructive way.
...now I'm contributing to this thread -- shoot!