It is important that we understand the mind of the cults. Joseph Smith had been a Freemason and was removed from the Masonic Lodge. That fact helps to explain some of the Mormon ritualistic structure. Rev. Moon had a Christian background in the Presbyterian Church in Korea. He drifted from it into Pentecostalism and then into anticommunist activities.
Cults usually center around the leader and often the cult dies when the leader dies.
The reason they continue is because the writings of the deceased leader are accepted as gospel. The founder is then classified as messianic and is placed on a pedestal to the point of adoration and worship. Even though the writings and ideas of the founder of the cult contradict the Word of God, they are accepted. The Scriptures are then twisted and, in some cases, the Bible is relegated to a position below the writings of the founder. A classic example is the Book of Mormon.