As I stated in the message itself, even though I was using a reply to your post as my starting point, my actual post was aimed at the discussion in general, not at you personally. The sentence you post was part of my general response to things people said in this thread, not to you.
As for whether or not the post was on topic - it started out with a discussion of SF and horror in general, a topic I explicitly said, as moderator, should not be continued in that thread. It then proceeds to mention the episode several times, but in the context of arguing where it belongs relative to other stories - to me it still felt more like a discussion of genre using the particular story as an example, not a discussion of the story. That was a judgment call on my behalf, but when I split a thread I can't split posts in half or duplicate them, so I had to make a decision, and frankly, since the beginning of the post specifically did something I said shouldn't be done in that thread, the rest of the content was not particularly important in making that decision.