I have always held that they're sincere, and probably super zealous, as it is those types that would devote their lives and rise up the ranks. To me they were probably more indoctrinated than anyone.
Then I see things like that last quote that was taken out of context and deliberately used a certain way in a WT, and it really makes me wonder if those that write or the gb themselves aren't playing some sort of messed up power game.
So I don't know. I guess I'd go with D. other, as my answer. My heart says totally sincere and delusional, but mu head says what about this or that where it seems like they are leading in a way that almost mocks their followers.