Man is hardwired to worship. If the does not worship the God who created all that is, he will revel in superstitions and worship degrading substitutes for God. Walter Russell Mead at The American Interest nails it:
Human beings feel instinctively that the visible reality that we live in day to day is connected to something larger and more mysterious. When belief in God goes away, the hunger for meaning and connection with a truth beyond the business of daily life remains. The New York Times:
Like many Europeans, Marianne Haaland Bogdanoff, a travel agency manager in this southern Norwegian town, does not go to church, except maybe at Christmas, and is doubtful about the existence of God.
But when “weird things” — inexplicable computer breakdowns, strange smells and noises and complaints from staff members of constant headaches — started happening at the ground-floor travel office, she slowly began to put aside her deep skepticism about life beyond the here and now. After computer experts, electricians and a plumber all failed to find the cause of her office’s troubles, she finally got help from a clairvoyant who claimed powers to communicate with the dead. The headaches and other problems all vanished.
People who think themselves too rational for religious belief end up believing in “astral forces”, ghosts and other phenomena. Sometimes these superstitions take the deadly form of political ideologies that fanatical believers take up with religious fervor—communist atheists murdered tens of millions of people in the 20th century in the irrational grip of an ugly ideology. They scoffed at the credulity of religious believers even as they worshipped the infallible insights of Stalin. Similarly, the Nazis presented their faith as an alternative to the “outgrown superstitions” of historic Christianity.