True. But the same answers would apply to both situations (a theist becoming an atheist and a theist converting to a different religion), so it would be valid to ask what it would take for a theist to convert to a different religion.
I am not an atheist, and do not really care about that side of the context.
many things could cause a theist to switch:
Disillusionment (sp?) - I was raised RCC, and when I was 18 I left for a while and experimented with protestantism, but it was too strict, and seemed more like mythology, too many creationists and literalists for me, so i switched back to RCC a few years ago.
Marriage - my father became a RCC member when I was 7. everyone of us was but him, and he went to mass with us all the time, so he joined the club.
Birth - If I married a Jew girl, our children would be Jews by birth.
Slavery - You think West Africans were Christian when enslaved?
Economic advantages?
simple choice - I have felt the pull towards christianity, but personally choose to go with the RCC, after years of looking around.
there are probably more but I cant think of any ATM.
So what would it take?
God would have to send me message, perhaps a calling.
Edited by Artemis Entreri, : forgot one