I genuinely don’t think the burning was for religious/ritualistic purposes. IMO these two spout religious ideology whenever it might benefit them, but I have serious doubts either is truly devout. I half-suspect both of them thought all of it, LDS and their own “visions”, was bunk. I wouldn’t put it past either of them to ritualistically burn Tylee or anyone else for that matter, but only to influence an audience of their followers. Unless there were witnesses, the burning was for practical purposes only.
JMO
Well, they certainly engaged in some 'spiritual practices', probably experimented with altered states, trance etc... I assume, and I state assume because I do not know, that they engaged with a belief system, either their own or something they discovered.
It is likely and possible that this involved a ritual or two.
I don't , for a moment think that this is beyond the realm of possibility that
@Boxer mentioned.
Human sacrifice is as old as time.
There is no evidence suggesting they did not sacrifice these children to a deity of sorts..
We can ascribe, accurately, their human characteristics from their words and actions and their stories.
I think we need to start thinking about digging deeper into their actual beliefs.
They desecrated the Mormon religion, I believe.
But they took some ideas and teachings from it and it's likely and possible they received an education there.
Then a change happened, ego dominated spirit, left hand path.. question is which one?
What magical or occult beliefs and practices did they ascribe to?