How does the author use dark humor?

What we see from the combination of horror and humor is that for purposes of morale and vigor, having a sense of humor is absolutely vital. There is simply no other response that can ensure any amount of positivity, even if the positivity is just the ironic observation about how absurd and stupid all this unnecessary suffering is. To view human hatred as a stupid mistake is a successful point of view in these stories, or at least, it helps to reduce the horror and pain sometimes.