Dawkins and Determinism

[naimless]

I had considered this, but Wiki explains:

Dawkins describes his childhood as "a normal Anglican upbringing". He was confirmed, and embraced Christianity until his mid-teens, at which point he concluded that the theory of evolution was a better explanation for life's complexity, and ceased believing in a god. Dawkins states: "the main residual reason why I was religious was from being so impressed with the complexity of life and feeling that it had to have a designer, and I think it was when I realised that Darwinism was a far superior explanation that pulled the rug out from under the argument of design. And that left me with nothing."

I just don't understand why a man left with nothing is motivated to spread nothing.