As cynical as I can be, I would refrain from making such a blanket statement. I think there are some who are sincerely trying to do their best and are not in it for the glory. That's not to say there isn't some ego involved -- a splinter group, by definition, is led by people who think they can do a better job than the group they left. But to declare them unworthy to be ministers... I don't know. It certainly applies to some, but I cannot see where it applies to all. Sincerity may not be a guarantee for truth, but it is a guarantee for sincerity.