There's certainly some truth in that; the environment someone is brought up in during their most plastic developmental period sets the tone for their approach.
This essentially reduces the problem down however, saying that the twisted narratives of media are resultant of a system where early education teaches you to simply accept that message. (I speak in what would be hyperbole in most cases for the situation you suggest, where the parents and friends advocate taking narratives "as faith"), and at that point it's a bit of a chicken and egg problem.
The parents and friends lived in a system that perpetuated their narratives, so they communicate this to their children, to create a new generation of etc.
So where do you break the cycle? I'm not going to be sticking my nose into someone else's parenting, as much as I think it might do them good. Maybe I should, but I haven't been convinced yet. At this point the best approach I've come up with is just trying to _talk_ to more people. Prompt them to think; and be communicative.