A.) seperate his Jehovah's Witnesses from the Bible Students
B.) seperate his Jehovah's Witnesses from the rest of Christendom
During Rutherford's time you had a reinterpretation of Bible prophecy to fit JW's as God's organization. Fred Franz continued this and used the Bible to "prove" that organizational changes were prophecised and proof of the Watchtower's appontment
^^^ This. They made this into a war cry. And the end was "soooo close," as the years ticked by they were so invested in this mindset, re-evaluating the dogma was something they hoped they didn't have to do. They dug their heels in and put their blinders on and kept their "eyes on the prize."