I'm not a Christian any more but to whatever extent I can still have doubts about it from time to time, that doesn't extend to Catholicism. In other words since I was indoctrinated a Protestant I'd never give Catholicism the time of day even if I did return to Christianity... much less as an atheist. Too much idolatry... turning every man and his dog into tantamount to a god to be worshipped (saints and the virgin mary), not to mention the reliance on graven images. Sorry about that... just letting out a bit of my inbuilt (read indoctrinated) Protestant anti-Catholicism even though I'm not a Christian any more
