If he wants to die, let him. Give him the means to kill himself if he wants to.

I know when I die, I will go to heaven, kill St. Peter, smash down the gates, walk to Jesus' house, beat him to near death and drag him to God's house. Once there I plan to kill God and then rape Mary right in front of Jesus and then kill her. Finally I will tear all of the flesh off of God's head and skull fuck ever open hole I see...then I will kill Jesus.

I am sure some Angels will show up. They'll get dealt with since I should have acquired weapons by then. And then...Satan gets paid a visit. he he he