Remember that the past fifty years has been the age of the Big Bang cosmology. We have learnt to see all reality as a slow-motion explosion, as pouring itself out and passing away, as dissemination. We live in a postmodern epoch in which there is nothing absolute, nothing permanent and nothing substantial.
For it was only via the idea of God that we were able to develop all our ideas about a unified self, reason, a unified law-governed cosmos, sovereignty, property, supervision (Providence) and management, long-term purposes and action to attain them and so on. God taught us everything, so that we are eternally grateful to God even as we now leave him behind.