I've seen users remark that it is not a violation of the Be Nice policy to insult people who are not SE users -- i.e. that users are only required to "be nice" to other SE users. Usually this is stated in order to excuse insults made toward public figures (like politicians). Is that true? Does the Be Nice policy apply only when referring to other SE users?
Parts of the Be Nice policy suggest that it only applies when referring to other users, e.g.:
In summary, have fun, and be good to each other.
On the other hand, other parts of the policy don't seem to make any distinction between users and non-users:
Your tone should match the way you'd talk in person with someone you respect and whom you want to respect you. If you don't have time to say something politely, just leave it for someone who does.
I would think that the Be Nice policy applies when referring to non-users as well, but I can't find a specific statement that it does. Since some users think it does apply and others think it doesn't it'd be nice to have a definitive statement whether it does or not.