It's even scarier that it's a disease - it'd be one thing if it was 'a demon did it', but that's understandable somehow. A disease is brutally mechanical, which to me is scarier.
Madness string 16472
I have always thought the idol to these kind of believers was the Bible. Not the teaching within. The actual book above the teachings. Not as a tool to learn how to live but as a sword and shield used to justify their hate.