As someone with no particular aptitude in general niceties, I always welcome Crocker's rules, and mistakenly assume that others do, too.
I wish you luck in deciphering the reason(s).
My best (but still low-confidence) guess, based on the timing and on being overly critical in a comment is that this may have been taken as overly harsh.
For what it is worth, I really liked your comment. Though I guess I'd be pissed (for a minute) if someone said it to me. I didn't read the whole discussion, but she seemed pretty passioniate about her views. When I get that way, nothing makes me angrier than someone (rightly) pointing out that I'm "too passioniate" to discuss this clearly.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.