The atheist has no platform on which to stand. His excuse is like tat of the Agnostics self erected logic. In the final line the ultimate cause for atheism is a love for darkness, an Unteachable spirit in following the truth of the bible ,and an independent attitude.
The bible calls atheists "fools" (Ps. 14:1). They have no excuse . God is ready and willing to speak wit such persons , if they only listen with a sincere heart.
God bless you.