Dave wants his few remaining followers to understand that if their unconverted spouses, kids, relatives and friends are wicked they will be destroyed. Then Dave's encourages his followers that they will have their minds wiped clear of who those people were. They will forever forget about them. They will forget about their family and friends just like they will be required to forget about the sins of those who are under their rod's of iron. What a wonderful world this will be!
For instance, the destruction of the wicked. We have always talked about it—you’re not going to want to think about your children or your parents or your husband or your wife or your relatives if God had to destroy them. So you probably will have the ability over knowledge, even to eject from your mind…We have always believed and understood this…Remember God’s ability to forget sin. We will have to forget, certainly, our own sins; the sins of others if need be. You’re going to have to be able to forget other people’s sins once they have repented, and you will probably be able to forget the loss of loved ones who are not in the kingdom of God.