Here is how you know it's a cult....
Tell the elders that you have lost faith that there is a god and they will give you spiritual encouragement, read scriptures and pray with you in an attempt to strengthen your faith.
Now go tell the exact same men that you don't believe the GB are being led or used by god and you will get a completely different reaction. Not a good one.
Believing the GB speaks for god is more important than believing in god itself in this cult.