Usually when we think of firing someone, we have the image above in our mind. We think that it must be totally negative, adversarial and hostile. Certainly the process of firing is difficult but sometimes it's necessary. If you are a church or ministry leader this issues isn't about "if" you will ever have to deal with it, but rather simply a question of "when".
Related to Henry Cloud's book, Necessary Endings, here are a few videos of Henry Cloud discussing with Steven Furtick when and how you should fire someone: