"Ray Franz was put on the governing body in 1971 but for when they first started mentioning the 1975 which I think was around 1968 or so that is correct. My family told me/believed that there were many apostates in Bethel and all of them were responsible for 1975, and because they believed that, they never had a problem with what happened because they thought it was an apostate thing."
Yep. When you revise your own history (whether through publications or word of mouth) and then prohibit your subjects from reading or discussing anything you don't approve of......you can accomplish anything.