I also think it's possible to practice the care for people ethic when you don't like them. Caring in that context is about respect for life, not candyfloss.
And if we're talking about what happens after the crash, will we be in a position to avoid/exclude people we don't like if we are dependent on them for food, water, shelter, seed, etc etc? I wonder how many of our current choices about how we engage with people come from a position of priviledge. I'm not saying this is wrong (it may be appropriate at this point in time), just that we may not always be afforded that luxury.
(I don't know anything about the above arguments that happened in another thread btw).
