Good for Tutu, respect.
No. Zero respect.
He gave final approval to his speaking engagement a long time ago, and when he gave that approval he knew who else was being billed to speak. He made a commitment and he is now reneging on that commitment. Hardly the traits of a so-called leader or religious man.
Discovery has spent a lot of money on the conference through marketing and advertising specifically billing Tutu as a speaker. If there is any financial repercussion as a result of his actions, I hope they sue him.