This would be less revealing than you'd hope. If NASA did a press conference this afternoon telling you that there was an inbound planet-killer that would annihilate us in six weeks, you'd still brush your teeth tonight. It wouldn't be that you'd didn't believe them either, it's that your mind isn't rational in the way that we like to flatter ourselves. Your mind's this big burlap sack of agents, and they aren't in perfect sync. The one that tells you what will happen in 24 months isn't the same one that plans out your routines... the latter can still have you behaving in ways that make no sense considering the strongly-confident predictions of the former.

There is evidence of this everywhere, in nearly every person you meet. Including yourself. If even skeptical atheists act that way, why would the bible-thumpers be different? If they weren't different, how would that be an indictment of their belief?