Atheists, tell me, a Roman Catholic: why should I become an atheist?

[Jehanne]

Are you sure that you were raised as a Roman Catholic?  If so, it seems for someone like you, a "cradle Catholic", not to know about this aspect regarding the infallibility of the ordinary and supreme Magisterium of the Church.

The church doesn't like to emphasise its shortcomings. Thus you get lots of kids being told that the pope is right, but none of them being told what happens when one pope contradicts another, or even instances where it happens.

Most people don't really learn about their religion until they get curious enough to question it. And for most people that doesn't happen.

For most people (Catholics, especially), their religion is a pro forma type of activity.  As I tell my extended family who questions why I am an atheist, "I care too much about religion to believe in it."