Additionally, the Disciples of Christ are another "restorationist" religion along the lines of mormonism.
Sidney Rigdon was affiliated with the Campbellites before he decided to help Joseph Smith run his scam on the world.
Perhaps then he at least had a small understanding where Mormons were coming from to some extent...unfortunately that would mean he saw the shroud covering only, as most only see, I wonder if he ever attended one of their churches? But even then one is only going to see the counterfeit teachings........until they’ve been there long enough to have their mind reconstructed...then it is an easy thing to push any ill conceived idea into the mind.......there’s nothing there anymore to oppose it... The blindness is completed.