Hi, Greenie:
There are several examples that I can give which Penton brings out throughout his book. But I will start with CT Russell, the Watchtower founder. A carefully crafted myth among the Watchtower leadership, and percolating down to the rank and file followers, is that Russell was led by "god" to rediscover the original "truths" of 1 C AD Christianity. Penton points out that all of CTR's teachings, and certainly most of his more important ones, such as 1874, the yearly celebration of the Lord's Supper, and others, actually came from other men he associated with, such as Nelson Barbour, George Storrs, and George Stetson.
On page 17 of the book Penton says: "The practice of celebrating the Memorial of the Lord's Supper once a year on the supposed date of the Passover was learned by Russell from George Storrs. This custom began among members of Storrs' church The Life And Advent Union in the 1860s". Therefore it was not as a result of a careful study of the Bible, but as a result of a precedent established by someone else, that the Watchtower began this observance.
Other teachings of Russell, attributed to divine intervention, such as the "Parousia" of Christ being an "invisible presence" are also examined. This Russell got from Barbour, and Russell continued in this absurdity, even after Barbour himself repudiated this when he realized how silly this was.
Another carefully crafted myth regarding CTR is that the two major schisms that fell upon his movement were the result of "satanic attacks" in an attempt to derail the infant Watchtower movement. Actually, Penton points out that this had a far more terrestial source. As CTR's theology was evolving, he began to construct doctrines that many found bizarre. One was that the words " The Christ" [as opposed to simply "Christ"] referred to the wider body of "anointed" followers of Russell. Many refused such an explanation and left the movement in 1878 and 1881, because they realized that what CTR was teaching was that the "anointed" actually participated in the redemption of mankind.
Later Russell also stubbornly insisted on a version of the New Covenent that became controversial. Several prominent followers felt that CTR was secretly trying to smuggle in non biblical teachings into the movement, and failing to reason with him, left. So, far from being devilish in origin, much of Russell's ealy troubles were of his own making.