An Atheist Statist is so far detached from the spiritual world and even just reality that it'd take a lot of new information to change their minds, and even that's only possible if they're willing to calmly listen to opposing arguments, which is unfortunately hardly ever the case. The general approach on our side is that you just start planting small seeds of truths into their minds by hinting at things or pointing out simple facts, and hope that eventually they will sprout and lead to their awakening.