Christians supporting same sex marriage have turned away from the doctrine of Creation (Gen1:26-31).
They have deserted God's truth of Adam and Eve to follow the myth of Adam and Steve. The world, following the spirit of rebellion against God, is embracing the diabolical lie of marriage equality.
Gen2:20-25 shows that God' took Eve from Adam not Steve. Eve was Adam's created helper not Steve.
So the climax is a clincher for God's truth about marriage:
"For this reason man will leave his father and mother and be united to his wife, and they will become one flesh.