This was an interesting episode to look at the differences between cultures. That kids culture allows the taking of the son of those you kill. We don't. Who is right? Why do we humans think we are always on the moral high ground? Who is to say the Talarians aren't right?
Q talks about the hubris of humans and I think he is right on. We look at other cultures, including those on this planet, with disdain.
At the end, who has to make the call to the Grandmother?