1. There is no evidence for God’s existence.
There is at least one major problem with this line as it is typically presented.
One often hears, “there is no evidence for God, therefore Christians believe in fairytales,” (or something to that effect) when what is actually meant is more like, “there is no physical proof of God’s being in the physical world, therefore Christians believe in fairytales (since all ‘real’ things are physical).”
The fact that Christians have never claimed to believe in a physical God – as merely one more physical being among all other physical beings in the universe – does not stop these sorts of atheists from thinking they have laid waste to 40 centuries of religious thought, experience, and refinement with the mere mention of this evidentiary boogieman. It rarely occurs to them that such physical proof would actually run 100% counter to Judeo-Christian theistic claims. Their argument against a physical God is actually applauded and defended by Christians.
This fact is not, of course, proof that the Christian claim is true, but merely proof that with such attacks the atheist has not even begun to swing in the direction of Christianity.
However, if what they mean is something more like, “There is no logical evidence of God’s existence…” then the straw man suddenly becomes a brick wall. The logical arguments for God are vast and time tested against some of the greatest minds of all time working tirelessly against them. They are well-known arguments and can be easily found online or in print, but let me give one quick example. I recently read someone who claimed that I conceded the atheist’s argument that God is not real since the faith teaches He is not physical. Let me help those who might struggle with this idea using a quote from David Bentley Hart: “Why can’t there be a physical explanation of existence? Because anything physical is, by definition, something that exists. So there cannot be a physical cause of existence.” The faith claims this non-physical, yet real, is God. His absolute “existence” is more real than physical existence by order of priority.
But besides logical arguments an additional reason why atheists often fail with this approach is because they run up against Christians with living experiences with God. There is no amount of speculative babbling from the uninitiated that can oppose the one whose faith is built on a living subjectivity to the presence of God. On these matters Kierkegaard had it right – in objectivity there is no truth for the single individual; the truth is subjectivity.