It doesn't really bother me. I say it. You hear things like 'God knows', or 'Oh my God', but it doesn't really mean it has any religious meaning. It's just an expression, and even if it did have religious undertones it wouldn't really bother me.
You could instead say something like 'Dawkins knows', or 'Oh my Dawk.'
You could instead say something like 'Dawkins knows', or 'Oh my Dawk.'