Dear Sandra:
It’s not so much a cult as it is a heresy and is no more valid as an authentic religious belief than is Buddhism, Hinduism, or Islam. To the extent it is a civil belief making for good citizens it is no different from Quakers, or Mennonites, or good-citizen atheists.
I suggest a starting point for analytical insight is the book “Heresies” by Hilary Belloc, a renowned English author and essayist. That is if you have an inquiring mind.
“Heresy”
...and by whose definition the Tradition of men, or the umpteen vacillating council of political clergies from Nicene council down through the ages?