Communists tried that in real life. It didn't work out so well.
…The first great atheist uprising was the French Revolution, which sought to dethrone God with godless “Reason” and sought to replace the Holy Trinity with the atheist trinity of liberté, egalité et fraternité. The man who is traditionally attributed with coining this triune revolutionary war-cry, which would later be officially adopted as the motto of the French Republic, was Antoine-Francois Momoro, a rabidly anti-Christian radical who advocated the eradication of religion. He played an active and bloodthirsty role in the crushing of the Catholic peasants of the Vendée and was a key figure in the notorious Cult of Reason, an anthropocentric alternative to religion, which effectively enthroned self-worshipping Man as the Lord of the “enlightened” cosmos. In 1793, Momoro supervised the nationally celebrated Fête de la Raison (Festival of Reason) in which his own wife was dressed and paraded as the Goddess of Reason, surrounded by cavorting and costumed women. In a wild and licentious liturgical dance, the Goddess of Reason processed down the aisle of Notre Dame Cathedral in Paris, surrounded by her female entourage, to a newly-installed altar to Liberty, the Christian altar having been desecrated and removed. All across France, Christian churches were desecrated and re-established as Temples of Reason.The Cult of Reason metamorphosed into the Reign of Terror in which the streets of Paris literally ran red with the blood of its victims. The Goddess of Reason made way for Madame Guillotine who was omnivorous in her bloodlustful appetite, devouring Christians and atheists alike.
Guillotine, Gulag and Gas Chamber: The Glorious Gifts of Atheism to Humanity
Braga had a casting couch for young men.