Honestly if he showed up at the house I would be preaching about the onel and only church and how everyone outside of the
Acts 2:38 message was lost. If that offended him it would be better if he wasn't there. A little leaven leaventh the lump Paul said. If he wanted help I would do everything in my power to help him and his family but no one is bringing false doctrine into the church I pastor without a strong warning. Go ahead a shoot but I am straight forward. He would be more than welcome if he wants help.