It simply proves that naturally, organics tend to care more about those that are close to them than about aliens.
And I don't think that it's necessarily a bad thing.
Sure, you need to be aware of the bigger picture, and it does not excuse being an evil monster, but caring more about your "clan" is simply a natural thing to do.
I was going to respond and say, "All of which doesn't address the question I asked."
Then I went back to see the exact question, and I see that I was ambiguous. I wrote:
Why would I value my own species at all?
If that is read as "Why might I value my own species at all?" or a request for help finding such a justification, I think you (and the others) have actually done a really good job of answering the question.
What I was trying to ask, though, was, "Why would I
necessarily value my own species?" It seemed to me that people were assuming that any character would, and I was looking for justification for that assumption. I was arguing that one cpuld have a moral standard which one's own species failed to meet, or failed to meet as well as some other species (something I think needs to be possible in any defensible moral system).
Moral worth needs to be based on something. Things we grant moral worth need to exhibit some characteristic we value, and it's that characteristic that grants them moral worth. If some other species does a better job of exhibiting that characteristic, or if we discover that our own species largely doesn't exhibit that characteristic, then we wouldn't value our own species as much (or at all).