People hear what they like to hear. And they like to hear what they already believe in.
The closer a topic is to someone's identity, the harder it becomes to make them look at it objectively. For it is now part of their reality. Their version of 'the truth'. You feel perplexed on how can someone not understand something so obvious, and they feel the same for you.
Even if the conversation is about something that hasn't latched to their identity, it's pretty difficult to make them change their minds; but at least it won't ruin your relationship with them. It's all fun when the conversation is about a movie or sport, but try telling your aunt that the televangelist she believes in and donates money to is a scamster. An impostor.
When the only upside with such a discussion is to win an argument, it's best to let go. You're fooling yourself to think that you will come out as the Buddha, having shown the right path to your friend.
Instead, you'll be the one who'll be ostracized and ridiculed. It's one thing to keep your thoughts to yourself, another to live as someone considered a lunatic by his friends and family.
You cannot talk someone out of their reality by logic and rationales. If that is your aim - then old age and/or great riches do the job much better. And it makes sense to some extent. If you're really so smart and wise, you should be able to leverage that to provide value to the world and make money in return.
So instead of wasting time winning ego competitions, use that knowledge of yours for something grander. Till then, stay quiet and work.
Sixteenth-century Italian philosopher Giordano Bruno was one of the most fascinating thinkers of his time. He had quite a few radical thoughts for his time - like the universe is infinite and there is no center, and that stars are just distant suns. He didn't think Jesus was the son of God, but rather "an unusually skilled magician", and even publicly disputed Mary's virginity. While we cannot say much about the validity of his theological claims yet, his scientific position did come out as plain vanilla truth. Just that, it didn't matter.
The Roman Catholic Church found Bruno guilty of heresy and on February 17th, 1600, burned him alive while tied upside down to a stake.
Bruno’s monument at the place he was executed - Campo de’ Fiori in Rome
We are descendants of those who did not want their 'reality' questioned. Those who questioned were either silenced or left to live alone and die as depressed souls. Their genes did not pass on to the subsequent generations. For us social animals, it's not natural to live life as a contrarian.
Don't be Bruno. Don't fight evolution.
You can reach out to me @yawyr_vk