We can get fairly worked up over an opinion. A long time ago, I can remember vigorously debating with friends. It’s an opinion, became my overriding thought. I don’t need to change theirs. It doesn’t change the reality.
What is useful is to understand their opinion. A person usually holds a different opinion because they have either received information in a different way to you or they have had a personal experience.
Their opinion is valid. It can take people a very long time to change their perspective and their opinion – ask Copernicus. There are many barriers. Not least of which is being an outcast from one of their dominant tribes.
Try to discover more about their opinion.
Stop and listen. Both sides. See what specific, periphery ideas you can agree on. Note those. Then progress to other common ground. Discover what specific item is you are disagreeing on. Are there any facts you could search the internet for? Are there interviews, podcasts or videos outlining the idea from various perspectives? Is there someone who may be more eloquent with respect to this topic? A third party may reduce the tension and emotion.
Your opinion is simply an opinion based on what you are aware of at the time.
For example, it used to be conventional wisdom that Christopher Columbus ‘discovered’ the ‘New World’. For people who had never heard of this land mass before, Chris discovered it. But for the people who lived there, he was a visitor at best.
He didn’t create that new land mass. He went looking for something new and found it. A bit like someone looking for your wallet and jokingly calling out ‘finders keepers‘ when their hand is in your pocket.
When it’s an opinion, let it go calmly.