I cannot even begin to understand why intelligent and educated people believe in a god. I can only speculate that for some individuals there is a dichotomy in their thinking, between objective inquiry and analysis and the subjective and unfalsifiable belief in something supernatural.
My speculation is supported from what I have read that some scientists simply feel the presence of god, whereas they would never feel the proof of their scientific hypotheses.
I can understand why religion was invented by men at a time when they knew and understood very little about reality. And that religion persists in the simple minded, the uneducated, the unfulfilled and in third world countries where life is often inhuman and not worthwhile.
If I were a god I would ban religion and would encourage my flock (easily herded) to think more for themselves.