This story teaches false doctrine that is not harmless. Compare the story line with page 8 of February 2010 Ensign and Lesson 3 in Gospel Principles. I don't want my children to think that we shouted for joy after our brothers and sisters lost a war and were cast out. That is only one of the problems. On my mission, there were problems because missionaries taught this doctrine.
I love using music and theatre to teach, but this one is awful.