Reddit mentions of Conversations with Nostradamus: His Prophecies Explained, Vol. 1

As far as Scientology, I didn't take extensive notes when I was researching so I'd have to go back if anyone wanted citations, but the general gist I got was that Hubbard was being "pursued" in his later years.

He was always on the move either in a boat, out at sea, or in a travel trailer when on land. He felt he needed to be mobile for some reason. I can't say exactly what was going through his mind, but the behavior sure looks like somebody wouldn't let him get comfortable in one spot. (Here's an interesting video about "battles of will" and making the other guy "move").

In my opinion, it's pretty clear who was after Hubbard. The US Government was not too happy about Operation Snow White. After that happened they had no choice but to counter-infiltrate Scientology not only the institution, but again, in my opinion, his mind.

I think the Deep State/Cabal/Shadow also had a hand in derailing all the other "Spiritual" leaders around that time like the resistance out in Oregon to Osho Rajneesh and many others.

I really don't know too much about Mormonism. The only thing I've read recently was this passage in Conversations with Nostradamus who everybody thinks is talking about Joseph Smith:

"He says a minor event this quatrain refers to as well, is an event that has already taken place. In the early 19th century there was a man who came into possession of some Egyptian documents of ancient times that were discovered in some tombs. And this man had a trace of psychic ability. Through this he gave an interpretation of these documents that was partially correct and partially incorrect. But he used this interpretation of these documents in the founding of a new Christian sect Some of the beliefs of this sect disagreed with the prevailing beliefs at the time and made the followers of this sect very suspect. For they seemed to be looking at some things backwards from what the theologians at the time assumed they should be, based upon the Bible, since these followers were also going by the information obtained from these Egyptian documents. He simply mentioned this as a minor event that this quatrain also described. History moves in spirals."

This above was part of the translation of Quatrain VII-14:

He will come to expose the false topography,
the urns of the tombs will be opened.
Sect and holy philosophy to thrive,
black for white and the new for the old.