Ah, damn. Reddit feels like a necessary evil at times--I hate a lot of people who use it, I'm neutral towards the majority, and the top 15% (on my own completely objective and fair scale) are pretty cool. If Hubski were bigger, I could see myself spending all my time here. (Also, any theories on why we're so small?) You might be interested in reading about social identiy theory, though I assume you probably know something about it already (I'm forming theories of omniscience around you). I'd encourage you to follow the links in the introduction section if they interest you, particularly the ones concerning self-categorization theory. I can get out some actual authors and my own analysis if you'd like, but it'd require shuffling through some notes, so wikipedia will have to suffice for now. It's a psychological view of the anthropological phenomenon of tribalism, I think it might appeal to you. Also, I'd like to realize my parenthesis to paragraph ratio is pretty high.
The trick is to only opine on subjects you understand, and to ask polite questions about subjects you don't. At least, that's what I try to remind myself. I like finding out new things so I try not to be an asshole when I'm on shaky ground. Well, wait. I try not to be an asshole anyway (believe it or not) but I try harder when I don't know what I'm talking about. Often that involves shutting the hell up. I've heard of social identity theory, but only in passing amongst the pop psychology I tend to devour. I do far better with books than with Wikipedia so if you have recommendations, I'm all ears. Literally. I can do two or three audiobooks a month but printed matter I'm around 2 a year.