In my own personal research into religion in America I have had to adjust my views often.
For one thing, one can't help but wonder at the fanaticism permeating the lesser educated and self-educated people.
It was do-it-yourself theology that did the trick! Any wild-assed idea was as good or bad as your ability to get other people interested. Certainly Joseph Smith's early life prepared him to be a charlatan and a trickster.
Joseph Smith worked on his idea over a period of time.
I see what happened with Smith's fantasy as a model of what happened to other religious denominations (including Christianity itself) over time.
1.A core incident is described.
2.Debate ensues
3.Reaction to the debate causes adjustments in the core story.
4.The "new and improved" version is offered as the core incident.
5.More debate and opposition challenges every aspect.
6.Additional adjustments in the telling start to strengthen the weakness in the presentation.
7.At some point the core story is vivid and defendable to the point it launches more elements into the myth.
Example:
Jesus was a clever, intelligent and authoritative Rabbi who was charismatic in his teaching and extraordinarily gifted at confounding the Priests and experts of his day.
Stories about Jesus circulated after his death. Arguments challenged various aspects of the story told.
"Official versions" attributed to people who "really knew" bolstered the core story. (Mark's gospel.)
More arguments, debates and challenges require strengthening accounts.
New "Official versions" emerge based on the simple stories--but--expanded to include yet more and more miraculous demonstrations of Jesus' power.
Finally, a gospel is offered (John's) which turns the simple Jesus as Rabbi into a superhero and God himself!
So too with Joseph Smith and his tale.
If you read the book by Richard Abanes about Mormon History you'll see the documentation of this gradual evolution of Smith and his presentation and "proofs" of divine encounter.
The overwhelming size of his followers only demonstrates his expertise at answering objections and plugging in to people's fanatical zeal about religion in America at that time.
The 1800's were filled with wild and wooly zealots with peculiar beliefs who were (in their everday life) ordinary people, good husbands and fathers and honest in every way. It is their superstitious naive gullibility that makes them vulnerable to Absolute Certainty.
I look forward to the Second Installment of the PBS documentary tonight!