This Easter it's important to remember what happened in Nicea.
The First Council of Nicaea was a council of Christian bishops convened in Nicaea in Bithynia (present-day İznik in Turkey) by the Roman Emperor Constantine I in A.D. 325. The Council was historically significant as the first effort to attain consensus in the church through an assembly representing all of Christendom.
Its main accomplishments were discussion and settlement of the Christological issue of the relationship of Jesus to God the Father; the construction of the first part of the Nicene Creed; settling the calculation of the date of Easter; and promulgation of early canon law...
Emperor Constantine was one shrewd hombre. By assimilating the religion of the slaves, he made himself one of the first populist Empires. He codified all of the Empire's main religion to his rules.
What were the results of this? The new Christianity had something for everyone in the Empire. Heather McDougall:
...early Christianity made a pragmatic acceptance of ancient pagan practises, most of which we enjoy today at Easter. The general symbolic story of the death of the son (sun) on a cross (the constellation of the Southern Cross) and his rebirth, overcoming the powers of darkness, was a well worn story in the ancient world. There were plenty of parallel, rival resurrected saviours too.
The Sumerian goddess Inanna, or Ishtar, was hung naked on a stake, and was subsequently resurrected and ascended from the underworld. One of the oldest resurrection myths is Egyptian Horus. Born on 25 December, Horus and his damaged eye became symbols of life and rebirth. Mithras was born on what we now call Christmas day, and his followers celebrated the spring equinox. Even as late as the 4th century AD, the sol invictus, associated with Mithras, was the last great pagan cult the church had to overcome. Dionysus was a divine child, resurrected by his grandmother. Dionysus also brought his mum, Semele, back to life.
In an ironic twist, the Cybele cult flourished on today's Vatican Hill. Cybele's lover Attis, was born of a virgin, died and was reborn annually. This spring festival began as a day of blood on Black Friday, rising to a crescendo after three days, in rejoicing over the resurrection. There was violent conflict on Vatican Hill in the early days of Christianity between the Jesus worshippers and pagans who quarrelled over whose God was the true, and whose the imitation. What is interesting to note here is that in the ancient world, wherever you had popular resurrected god myths, Christianity found lots of converts. So, eventually Christianity came to an accommodation with the pagan Spring festival. Although we see no celebration of Easter in the New Testament, early church fathers celebrated it, and today many churches are offering "sunrise services" at Easter – an obvious pagan solar celebration. The date of Easter is not fixed, but instead is governed by the phases of the moon – how pagan is that?
All the fun things about Easter are pagan. Bunnies are a leftover from the pagan festival of Eostre, a great northern goddess whose symbol was a rabbit or hare. Exchange of eggs is an ancient custom, celebrated by many cultures. Hot cross buns are very ancient too. In the Old Testament we see the Israelites baking sweet buns for an idol, and religious leaders trying to put a stop to it. The early church clergy also tried to put a stop to sacred cakes being baked at Easter. In the end, in the face of defiant cake-baking pagan women, they gave up and blessed the cake instead...
Of course, all the rebel zealots saw their chance to become part of the system... kinda like certain (former) alledgely radical popular leftwing bloggers we know today when Obama triangulated into town...
The religion of the slaves became controlled by the slave owners.
Thus, Christianity became a psyop of the Roman Empire, and has been used by every authoritarian in the West ever since.