Hello flipper,
I truly believe for most JW's who are still in and have doubts- it's the old cliché that "ignorance is bliss " - they WANT to keep their heads in the sand like ostriches ignoring the facts about the WT Society's injustices because it's a familiar feeling to them to be in an organization with everybody else feeling duped and disempowered as well.
Its always easier to stick with whatever seems strong against the challengers - just as when new atheist feels they have been duped by religion for years, they feel strong in their atheism. I don't think either side has to do much proving, just let the angst and the abuse of the opposing side be the glue which keeps their own membership.
Christ said it is important to approach like a child - and children cry at sad things years before they build a resolute attitude. He really had something there.