On social media, people post a lot of different things. Sometimes things we agree with; sometimes things we don’t.
When it’s a site like Facebook, where in theory we’re “friends” with the people whose posts we see, reading something we strongly disagree with can lead to the desire to correct their misperception. After all, they’re our friend, right? We want them to know right from wrong.
But to them, maybe what they’ve posted isn’t wrong. We don’t all agree on everything. If everybody thought the same way, the world would be a rather boring place.
It’s unlikely that you’re going to change someone’s mind by telling them they’re wrong. Unless it’s something factual, and you have the information to prove they’re incorrect, you’re dealing with a difference in opinions and beliefs. Those are neither right nor wrong in a general sense, only right or wrong for each individual. Telling a friend their opinion or belief system is wrong is more likely to change their mind about being friends with you than about the topic.
If it’s a case where there’s a huge discrepancy between your opinion and theirs, it might be a sign that the friendship really isn’t viable. Back in 2015, when the US legalized same-sex marriage, I posted things on Facebook cheering for the change in law. A friend of mine private messaged me to berate me for posting pro-LGBT+ things on my own Facebook wall, and made it clear that they strongly disapproved of any such thing and would “have a problem” with me if I shared anything like that with them in the future. I ended what was, at the time, a 29-year friendship because I refuse to have intolerance and hatred in my life, particularly in a venue where my offspring might see it.
But if it’s a milder thing, is it worth risking the friendship just to try to convince them you’re right? Of course it’s okay to express your opinion even if it disagrees with theirs, but unless you feel so strongly about the issue that you’d rather lose the friend than the argument, it might be best to agree to disagree.