I suggest you go back to Gerald Gardner, Marie Laveau, John Dee, or Robert Anton Wilson, or even late author Heinlein, and his idea of The Church of All Worlds.
"Stranger in a Strange Land" is, of course, fiction. But, RAH did have some connections to that world. He was peripheral to Jack Parsons' circle in LA in the '50s, had L. Ron Hubbard as a house guest for a while in the WWII era. And his second wife (Leslyn) was a witch.
See William H. Patterson's biography of Heinlein.
Robert Anton Wilson is someone I read a lot of when I was younger, but bounce off hard from now. I get the creeps even seeing his stuff for sale.
You would be surprised at the interest and practice of chaos magic.
Were it not for the repeal of The Witchcraft Act in 1951, by the British, I don’t believe it would have taken off as it has
Extremely interesting that you have referenced this exact information, as I was about to post it myself just before you did, but decided not to, as it was late. Thank you.
There is actually much more on the Heinlein connection to witchcraft and the occult, if one desires to make the connections.
As the Patterson biography of RAH was done in two books, several years apart, and due to my own research, I found it significant that Wm Patterson himself died the day (or the day after) the second book was published.