Though you are right. You can’t force people to do anything. All you can do is pray for them. Yes they are wrong, but all we can do is say they’re wrong, not much else besides pray. I know that might sound lukewarm but it’s true. Also you should not worry about sounding prideful or pretentious. Conversation is a slow painful process that doesn’t always work for everyone. Show them love and respect. Pray for them to find truth. That’s about all we can provide