@ethbro: I'd expect anyone who fires on any side on a battlefield to receive return fire. That hypothetical entirely disposes of "alienness" as a variable. In

@ethbro: I'd expect anyone who fires on any side on a battlefield to receive return fire. That hypothetical entirely disposes of "alienness" as a variable. In any case, I've been trying to argue a point on my own rather than being a Scott Alexander repost-bot, but I have clearly failed. Most of what I'm getting at is based on what I remember from http://slatestarcodex.com/2014/09/30/i-can-tolerate-anything-except-the-outgroup/ http://slatestarcodex.com/2014/09/30/i-can-tolerate-anything... . He presents this far better than I have.