I think the latest incidents of May 21 are an extreme example of the harm proseltyzing can do. People sold their home, sold everything, quit jobs, lost marriages, and more to follow the 'truth'. And I'm sure many were as convinced as you and me about our faith. You don't go out and sell a house without conviction, whether it be reasonable or not.
If it weren't for Camping's tremendous amount of proseltyzing, and th edollars of donations given to him for it, many people wouldn't be suffering the consequences today.
In India, Africa, and elsewhere, where there is heavy proseltysing, it breaks up family units, pitting brothers against brothers, men against wives, and more. How truly sad.