For me personally, what drove me away from my childhood religion was simple research into it's history. Why should I care if my leaders claim homosexuality is a sin when they've done far worse in the past also claiming to come from god?
Yet for my parents, going against the leader's edicts is unthinkable.
All that comes back to my thoughts on estrangement and religion. While that's not a route my parents have taken, it happens a lot from the online stories I've read.
I guess this is a long winded way to say I'm still trying to figure out how much culture causes religion and religion causes culture. How many of these wild generational differences are due to just general cultural shifts from things like media, and how many of these changes came from things like leaving a faith behind? Did A cause B or B cause A or is it too complicated to be answered in a HN comment section.