Theists are a minority in Europe, deists on the rise.

[Deus non est]

Deists are clinging on to the last vestige of a mythology that will become extinct when a civilization reaches it's end and another one takes it's place. The fate of all religions of ancient cultures is the same, a mythology people read about in their present. Assuming that our current civilization is not going to experience the same factor of the only constant being change is hopeful, wishful and conservative ignorance rearing it's ugly head. We will be a Type 1 civilization in about 100 years and will not practice what Type 0 civilization prehistoric Bronze Age troglodytes wrote in a book instead of a cave wall. For the same reason that present day people don't seek guidance in prehistoric cave paintings.