Something I noticed in the church growing up is that many devout people were easily able to point the rediculousness of other religious beliefs and the obvious grifting that was going on there, but we're totally blind to many of the same things in their own religious body or church.

To put it short, most people are hippocrates, I'm no exception. The Christian can't fathom why the Buddhist can be happy living without Jesus and so concludes what the Buddhist must actually be lying about being happy, while when they are unhappy themselves they know that the unhappiness must be because of Satanic influences on their lives so they tell themselves to ignore those and actually be happy. When you feel wrong about something it's either God speaking to you or Satan tempting you depending on what it is but you know the difference just cause.

These are just explanations to describe deeper human psychological mechanisms, these don't go away simply because someone chooses not to believe in a deity, our propensity to believe in illogical and rediculous things isn't something so easily disposed of, in many ways the Atheist who believes themselves immune to such things might be at a higher risk because they cannot admit to themselves that their beliefs might not be grounded in reason and logic.