If they are false believers, you let them. I know you're supposed to help them and bring them to the right path but.
In the world we live in today, people complain about everything. Everything is wrong, everything is immoral, people have become too sensitive and think they are never wrong. People aren't willing to admit their mistakes in the world we live in right now. So if you try to bring someone to the right way, you'll just end up arguing with them in conflict. So just let them be as they are. let them follow the wrong path, just don't do it yourself, and keep to the right one yourself. Their lives, their choice.