First something about the big picture, atheists are right in exposing the irrationality of the Christian dogma. However, the Christians are right in as far as their claim that there needs to be a Creator of this universe, Who employed natural means to do His work. However, both parties in their self-conceit are not listening to how Islam resolves their conflict; Islam as understood by the Ahmadiyya Muslim Community.
The Holy Quran says about the purpose of the universe:
And We (Allah) have not created the heaven and the earth and all that is between them without purpose. That is the view of those who disbelieve. (Al Quran 38:28)
Three well known atheists, Prof. Richard Dawkins, Michael Shermer and Matt Ridley debated two Christian and a Jewish apologist, including William Lane Craig, recently in Mexico, regarding the purpose of human life:
If Muslim speakers from Ahmadiyya Muslim Community had been included then the atheists would have at least gotten rid of theology with resurrection of dead and miracles that are in violation of the natural order and harmony and would have been left with a much more sublime theology!
If we find ourselves with a desire that nothing in this world can satisfy, the most probable explanation is that we were made for another world.
In the creation of the heavens and the earth and in the alternation of the night and the day there are indeed Signs for men of understanding; those who remember Allah while standing, sitting, and lying on their sides, and ponder over the creation of the heavens and the earth: ‘Our Lord, Thou hast not created this in vain; nay, Holy art Thou; save us, then, from the punishment of the Fire.’ (Al Quran 3:191-192)
Now, here let me introduce a short ten minute clip from a different debate by Prof. Richard Dawkins against John Lennox, where in while conceding that a reasonable case could be made for a Deist God, he very nicely articulates what is terribly wrong with the Christian understanding of God: