The problem, as conceded by an atheist philosopher: atheism doesn't work. Proponents of the "new atheism" would like it to, but their arguments don't stand up to the test of reality.
"New atheists", he explains, are basically people who say what they wish was true: not what there's any good reason to believe.
There's a basic divide in the atheist camp: on the one side, there's "New Atheists" like Richard Dawkins who say what fellow atheists would like to hear (a.k.a. preaching to the choir), but whose arguments are held by philosophers of any pedigree to be sophomoric nonsense. On the other side, there's "Old Atheists", like John Gray, who say it like it is: that atheism provides no coherent, rational basis for the world to work in the way that we feel it ought to.
There's a way out of this "dilemma", of course...