One of the insights I had as a skeptical agnostic that eventuated in my serious consideration of Christianity was the self-realization that despite the fact that I believed God to be unknowable and irrelevant I was constantly discussing and debating and considering His existence. I see the same thing regularly happening with New Atheists. Though they purport to derive their atheism as a result of scientific knowledge which they consider to be the ‘best way of knowing’, in practice they primarily use science as a reactionary bulwark against the possibility of God’s existence. Science isn’t the locus of their beliefs; it is in fact peripheral to their consideration of God.
The fact that their main use of what they consider the “best way of knowing” is to discuss and debate the existence of God verifies the Anselm’s notion that God is the ‘greatest conceivable being’ rather than diminishing it.