Actually its spelled Xenaphobia. Xena means hospitable and phobia means fear, so a Xenophobe is someone who is afraid to be hospitable. There is what's real and whats real in the OTU. In the real world, the motivation for settling the KBO and interstellar objects is that they are closer than the stars and their too hard to reach. In the OTU, its much less trouble to use the jump drive and go to the next star. I think in the future Interstellar travel will mean travel to interstellar bodies that are inbetween stars, the KBOs are just the closest of these.