How about recognizing that it's late on a Friday night (and Halloween at that) and give him a little grace. Especially as he came back well outside working hours to apologize to that specific arsian in the very comment you quoted.
That was not an apology, and grace should have been given by the author who demeaned that arsian to begin with. That comment by the author was completely inappropriate and should be brought to the attention of his employer as it was conduct unbecoming to someone writing for pay under the umbrella of Conde Nast. What any employee does reflects on all who work for the company, and the reputation of the company itself.
Empathy, kindness, respect. The comment by the author that he pinned to the story for all to see showed none of that.