Shangguan Bing Xue's concerns about another world invading Earth were not unreasonable and thus the slight break in her character was understandable. Until now, even if everyone had their own theories and thoughts, they had never thought of such a possibility... No, rather than saying that they had not thought about it, perhaps it would be more correct to say that they were simply unwilling to think about such an event.
Earth was already facing too many problems to count; zombies, mutant beasts, goblins, and who knows if there were more fantasy species roaming around out there. Even humans themselves were not allies as a race, separating out of fear of each other and fear of seeing their personal property harmed.
