[That sounds horrific, honestly, and the fact that she lived through all of that ... honestly might explain her and Five's friendship a bit. But she does her best not to dwell on that, and focus on answering the question.]

Because when people get scared, they try to focus on the things they can control. They can't rid the universe of aliens who want to kill them, but policing people who are different? That's definitely within their reach. Doesn't make it right, though. You're just kids.