Nice post, I agree with careful. " Their minds just were not strong enough to fully face the facts".
I would never try and shake older friends from there sleep. I tried talking to my in laws about some doubts I had early on and found it impossible; first their fanatics and second they have nothing else to live for. They devoted there whole lives to this faith, they breath it, live it and declare it to anyone that will listen. If you take this from them you just kill them. My mom falls in this same category I would rather let her believe what she need to believe and let her have peace in what time she has left. Trying to wake her up would be devastating.
MC