How do you talk to people about God who say they are Christian but their fruits show something different?

This is a good question. We have to be careful when questioning the genuineness of someone’s salvation just because their fruit does not match their confession. With that said, we should always speak with love to our brothers and sisters in Christ even when their actions may not be appropriate. If you see them doing something that threatens the witness of Christ, it’s always appropriate to confront, but always do it with love.