Perhaps I should explain what he is referring to…
I was not raised Christian but by extreme liberals made very aware of many things wrong with the Christian establishment. Though my parents did not declare themselves atheists (agnostic at most). Nor were they hostile to religion in general. Both were psychology majors and my father was a Maoist communist, black listed even (and very deserving of that, frankly). A child of the sixties, I grew up with peace marches, communes, and the smell of pot in the air.
For my investigation of the truth, I started with science, and made my explorations into philosophy and religion from there. I embraced a great deal of existentialism and pragmatism, and these became my stepping stones to an understanding of God and Christianity. An understanding contrary to the scientific worldview was never even close to an option for me. The question was always whether religion and the Bible had any value in that context. And I don’t think I could ever have seen any truth in Christianity without the explanation of life according to evolution.