That is up to you to judge - by the result. If they are actually advanced, why they should leave ISKCON? I know they're very good souls; they might have done some mistake out of misunderstanding - you invite them to come back again & take their position: Revision history
Diff selection: Mark the radio buttons of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.