He did assume that R’ Wolfson made a comment without knowing the facts. It may not have been said in a disrespectful way, but it is a criticism.
As an aside, Rav Wolfson is not known as a posek (AFAIK; someone can correct me if I’m wrong), and I would understand his objection to online sales on Shabbos to be more along the lines of hashkafah than halachah.