1. Their doctrine also states that Jesus is the Son of God just as Adam was a Son of God (a perfect human being), and that God's Spirit, entered Jesus at His baptism and then left Jesus in Gethsemane, prior to the crucifixion, so that He could suffer and die as a mortal. It was because God the Father was in Christ that He could speak as though He was God, because God was literally dwelling within Him and using Him to speak. This is similar to Modalism. This doctrine is also tied to the serpent seed doctrine to show that Jesus was the perfect sacrifice because He was a perfect human and had no link to the serpent. Message followers believe that the revelation (i.e. understanding) of the Godhead was formally abandoned with the Nicene Creed.
2. The Message followers believe that the original sin resulted from Eve having sexual intercourse with an upright 'Serpent' which was not a snake but the human-like animal between apes and man. They believe the serpent's current form is a result of God's curse in
Genesis 3:14. From this relationship, it is said, Cain was conceived and born. Abel, fathered by Adam, was born at the same time
3. A major doctrine that unites all Message Believers is the central role of William Branham who is believed to be a Word prophet and the messenger ("angel") of the Laodicean church age.
I think there is whole section here dedicated to Branhamism.