This is very sad. Joe is an example of someone who doesn't understand the law / gospel distinction. We don't have to travel very far to encounter people who don't know what God has done in Christ. They are right in our own neighborhoods.

 

This seems to me to be an indictment on the church that Joe attends. We must witness even to church-goers, and we shouldn't assume people understand the gospel.

 

Edited for brevity.