I don't think that's a good idea.

This is a war between good and evil as far as I'm afraid, and "good" is the young rapscallion trying to take on a fucking mega-demon.

It is best to try and preserve those social relationships, so that you can become a trusted confidant for advice, wisdom, and perspective. I've tried to do the same thing with my friends and co-workers. I don't push back on their believes too hard, I just try to walk them through the thought process because they've never even considered a different perspective most of the time.