The conservative establishment (bishops) usurped the message of Jesus at Nicaea, put words into his mouth, and changed Jesus into a king and conqueror, later to be used to conquer other nations.
Jesus' message of unconditional love and forgiveness was subordinated to the Machiavellian mass control techniques of the establishment - the fall/redemption, penal substitution theology of the conservatives. Jesus the teacher of love became Christ the almighty king.
Later St. Augustine and St. Jerome extended this control to sex, making sex the reason for the fall, and using guilt and disgust to make men and women feel unworthy of God's love, then providing worthiness (forgiveness)
for the price of obedience.
Jesus was then said to be returning to judge mankind (something which he refused to do in life) in the end times and the theology of rewards and punishments (which Jesus had rejected) was returned to the place of power which the priests of Yahweh had established.
So Jesus' message of unconditional love and forgiveness from God was lost to the world and in its place we have the Church.
P.S. If we can successfully remove the fear of God from the world's religions we may be able to prevent this from happening again (i.e. in the age of Aquarius).