It seems that the cult's obsession with Bob stems from a rambling, 1985 interview he did with SPIN, which was so fucking crazy I assumed they must have made it up themselves. But I looked into it, and it turns out it's legit. Here's some weird stuff he said about "the messianic thing":
"The messianic thing has to do with the world of mankind, like it is. This world is scheduled to go for 7,000 years. Six thousand years of this, where man has his way, and 1,000 years when God has his way. Just like a week. Six days work, one day rest. The last thousand years is called the Messianic Age. Messiah will rule. He is, was, and will be about God—doing God’s business. Drought, famine, war, murder, theft, earthquake, and all other evil things will be no more. No more disease. That’s all of this world."