Fine. Yeah. Humans have reasons, vampires have reasons, too. I don't know his, but I can't really account for the motives of random inmates. You want to know why someone would attack three other people? Your first clue is the fact that we're on a prison ship for dangerous criminals. The vampire and human and alien and whatever inmates are, generally, dangerous.

I'm human, and I'm still siding with the fact that humans can be monsters sometimes, too.