When your conversation partner is getting angry, the single best thing you can do in most circumstances is to stop whatever else you're doing and lis… - Peter Boghossian

Seemingly impossible conversations typically have one thing in common: they're about moral beliefs rooted in one's sense of identity, but they play out on the level of facts (or assertions, name-calling, grandstanding, threats, etc.). [...] The most difficult conversations, then, masquerade as discussions about something other than morality, but they are actually about what qualities, beliefs, attitudes, and behaviors individuals believe make them good people or bad people and why it is important to hold the right views among those.

What it means to hold a belief based on evidence is, by definition, that one is open to the possibility that evidence might be discovered that would change one's mind. If no evidence would change one's mind, then one is not forming one's beliefs on the basis of evidence.

Here's a heresy: "How do you know that?" is a powerful question for helping people think, but it's not the best question. The best question is, "How could that belief be wrong?"