I'm aware that she wasn't there for the actual stuff. But she just made this all up in her head? Why? Again...she COULD have left...so, on a baseless hunch she decided to join them and kill the world she knew? I assume that there was some sort of evidence left behind that explained some of this stuff to her. If they explained something INCORRECTLY, then that might even be WORSE, since...again...its not like they actually gave us any reason to think that she might be wrong. It's not like some other option was offered.