Ah, you made me go back and re-read to figure out what the heck I was talking about in the first place, again. It's been a few weeks since I've seriously gone at this thread, I'd pretty much abandoned this one to focus on Farming.
Anyway, I threw in the weasel words about it being a "sort of "Patriotism"" metric in the first place, because I knew that I was walking into a loaded term, but had difficulty coming up with a better one-word label for what I meant in the positive sense (so that high numbers intuitively correlate to good).
What I'm really talking about is what amounts to how dissafected someone is with their society - it's, in some ways, the class-based strife metric. The way to truly solve the problem caused by that stat is to ensure that there is social justice in your fortress - that workers are rewarded fairly and that harder or better work correlates to better rewards for their work, that at least some degree of social mobility exists, and that social safety nets exist for those who need it (which, in DF, would almost entirely consist of making sure that you don't go long periods of time without letting your lumberjacks do nothing and not having any fallback jobs for them to gain money from, as well as having a hospital that can provide healthcare).
Patriotism and jingoism are basically the "opiates of the masses" to patch up the holes when systemic problems exist, but that's not to say we couldn't model in some negative side-effects to such measures, especially when they become extreme. (Heckling the caravans, even dwarven ones, to try to get rid of the "foreigners", pressing for wars, possible "racial" tension against dwarves of different hair/eye/skin colors when certain types have a majority, that sort of thing.)
edit: and thanks for the encouragement.