@.caleb..@island man...the op asks the question of deliberate deception by the governing body, as the gb consists of more than one person we would have to assume the possibility that all members use deception simultaneously which imo is highly unlikely, or certain members are persuaded or possibly coerced into agreeing that a ' new understanding ' of a previously held belief should be presented to the jws as the spiritual food from jehovah gained through them by means of the holy spirit. It is this second scenario where I believe there is deliberate deception..eg the understanding of ' the generation ' notice the gb aka fds did not change their understanding of matt.24:34 until the realisation that their then teaching ( supposedly gained by jehovahs holy spirit direction ) did not 'add up ' to subsequently then change to a different understanding involves not only wilfully or unknowingly deceiving themselves as a whole or by majority binding decision ( and would we ever know if there was dissent ) but also as a result deceives the so called domestics.
As for ideologies (bodies or ideas of a group religious or otherwise ) imo there can be no more a fundamental ideology than the whole basis of jws believing that the fds/ gb is directed by jehovahs holy spirit to provide their spiritual nourishment, the fact that they use the deception of ' new light ' to justify their beliefs is built in to the construct of their continuing existence, otherwise they would be a much reduced religion or exist at all to the present. They are imo a religion which exists entirely through deception.
Best wishes.