Earlier quoted context omitted.
It's 'outgroup'. There's a really amazing post here about outgroups and the distorted way we reason --- or fail to reason --- about them. It's a bit long, but totally worth the read. http://slatestarcodex.com/2014/09/30/i-can-tolerate-anything...
> really amazing [...] a bit long, but totally worth the read You have just described at least half of the dozens of posts on that blog. (There's a best-of list, still intimidatingly long, here: http://lesswrong.com/r/discussion/lw/mmg/yvains_most_importa... and a best-of-best-of subset of that, unfortunately with only the titles and no links, here: http://lesswrong.com/r/discussion/lw/mmg/yvains_most_importa... . I…
This is something I've never seen stated outright before, and it seems totally true to me.