When you observe in their writing deliberate half-truths, quote mining, downright lies and blatant use of mind control techniques you would be naive in the extreme to think that this is the product of several idiot-savants, who accidently used the methods, over the many many decades it has gone on.
They know what they are doing, they pass on the skills to the new boys, who also are aware of what they are doing.
If they were really 100 % believers it would simply not occur to them to use such methods. They would not feel the need.
This is not to say they are all Atheists just in it for the money, it isn't quite that simple or that bad. They are like the Public Relation guys for large Corporations and Banks, they cannot just come out with the truth, they have to hide things, they have to protect their employer.
Such people may still believe in the intrinsic value and worth of the Corporation they represent, but realise they have to give a Public Image that looks good.
The GB and Writing are like that, but they are aware that what they do is far removed from being open and honest, which surely something called the "Truth" should be ?