The four cornerstones of a belief in Christ, which come under attack by unbelievers, as I have learned, are eternity, charity, accountability and morality.
If one does not believe in God, these valuable life components are either denied and/or confused. Without these aspects well understood within one's worldview, love, for instance, is changeable, such as its politically correct counterfeit, tolerance.
If one views himself as nothing more than matter, plus space, plus time, then the logical question is, "if true, then from what source would such a person know right from wrong?"
Even from atheists, I will hear them borrow from the Judeo-Christian framework when speaking of such bewildering questions like, "If God exists, then why does He allow tsunamis and earthquakes?" Their question is morally based, but, I, as a Christian, would ask "why this question?" when the evolutionist really has no basis for morality?
If one is a purist in his/her evolutionary views, and truly centered on a Darwinian worldview, from where would they derive morality, unless it is adopted from the Judeo-Christian worldview? How likely is it that morality was formed from the Big Bang?