Arguing about religion

If you want to stir up a hornet's nest then there's likely few better ways than challenging someone's views on religion. And I don't mean just religion in the classic sense, but long-held beliefs of any kind that guide our lives. We understand, from an intellectual standpoint, our views are not the unquestioned truth. They cannot be since they differ, if even slightly, from our fellow 7 billion soul mates on this journey. However, they feel right and absolute. The question for today is why does it matter enough to argue? Are we in hopes of swaying others to our own thoughts? And the follow up, why does that matter? Is it a tribal thing where we're testing the waters for common ground? People like us do things like this? We tend to gather in like-minded groups. I certainly am more comfortable chatting with our Hi-Fi Family than "outsiders" to the group. If I had to guess, I'd think it's a way to learn as opposed to hoping to sway. Whatever the case, arguing feels like it erects barriers rather than reaching across the divide. If learning or gathering is the goal, sharing's probably better than arguing.