The Son's of Perdition - the Concept!
I love that Biblical idea. The Sons of Perdition are those in the Bible, like Satan, who know the truth and rejected it. So they are damned for eternity - no chance of salvation.
I left the Mormon church myself. But I was mainstream LDS from the main church. The FLDS are a fundamentalist offshoot cult.
However, when I was Mormon I started to consider myself a Son of Perdition. I believed in the church but left for ethical reasons. I felt like Satan.