Edit regarding duplicate: This question is not about SE users vs. people without an account on SE. Rather, it is about actual individuals that are named, vs. loosely defined groups of people defined by their views, ideas, etc. Thus, it does not matter whether this group consists of SE users or not, like in the question this one is now closed as a duplicate of.
This is related to a post I made on meta Skeptics SE. All the relevant details of the particular case in question can be found in that post. This question is not, however, about that particular situation. It is more general in nature, and relates to the "Be Nice" policy.
A moderator referred to a group of people as "nutters". I flagged the comment, but it was declined. Normally, I believe calling someone a "nutter" would be a clear violation of the "Be Nice" policy, regardless of the views they held.
However, this situation is a bit different, as the user is not naming any given individual, but rather referring to a group of people who hold certain views, or propound certain ideas or arguments. Thus, I can see why some people would argue that this is not rude.
However, the user was clearly referring to someone. Thus, I personally tend to consider it rude.
This question is not about that particular situation, though.
Does the “Be Nice” policy apply when you are referring to a group of people, without naming names?
I would be interested in other people's views on this.
Related: Does the Be Nice policy require SE users to "be nice" to people who are not SE users (e.g. public figures)?