I get where you're coming from, I really do.
But as I've gotten older, the thing I've realized is that peace -- in one's life, and in one's mind, and in one's heart -- is an incredibly rare and precious thing. As long as the person's peace doesn't come at the expense of another person's wellbeing, coming in and fucking up their worldview just because you disagree with it seems like... well, a kind of rape of the spirit.
It's like with religion, right? I'm not a religious person, but I've got religious friends. One guy, he's part of what I would almost term a cult -- but they're harmless. They just believe weird shit that doesn't reflect any kind of reality. Misquoting religious texts, misunderstanding doctrines. That sort of thing.
The thing is, I wouldn't pick a fight with this guy about his beliefs -- even ones I know, for sure, to be untrue -- because what harm does it do? He's happy, and the world isn't harmed by it. Let him be, I say.
And I generally apply that to most people with whom I disagree, or who hold views that I find bizarre. As long as you're not standing on peoples' throats to have your happiness, have your happiness.
But yeah, when complacency leads to other peoples' misery? That's a whole different game.