Paranoia based on religious fanaticism. You should seek professional help.
Under that criteria, probably a good third of America should be under active supervision of a doctor. I can provide you with a few American websites, with readership in the hundreds of thousands, where "paranoia based on religious fanaticism" can encapsulate 50% of the articles.
Fighting demons, and saving souls is a pretty routine affair in the United States. You have it easy in Europe.
Also, please do not be frightened by people pronouncing a desire to go "underground". In America they have an entire industry dedicated to servicing the whims of these people, so again - they cannot be so unusual, or dangerous if profit-oriented businessmen are able to conduct dealings with them. So they like to live in old ICBM silos. So they dress up a few times a week and march around some forest clearing. So they buy a lot of gas masks and bulletproof vests. Yes, they're sitting on hundred of millions of rounds of ammunition. But is this really a reason to worry? Of course not.
These people are harmless. The real demons no one cares to slay.