Hi ExChristian. We've had and do have atheists and agnostics here. Thanks for reading the ToS and Mission Statement, Statement of Faith, Doctrinal Statement, etc. It's surprising how many people don't read those things even though they say the did and agree to them in order to join! (I know, I know, it's a lot of reading!!!) There is no problem with you being here at all, and our hope is that you might find a different version of Christianity than you may have learned about in the Roman Catholic church. Who knows, you may even find things you didn't know in the past that you agree with! Even if you don't, at least you will have more information to base your own personal decisions on.
Many times non-Christians will ask questions or make statements here (within the rules, of course) that stimulate us Christians to think through our beliefs and ask ourselves WHY we believe what we do. I think that's healthy! I've never liked the attitude of "I believe this just because this is what I've always believed and been told." I like to be able to know WHY I believe it based on scripture, not just what I've been told by other people. More times than not, it has been non-Christians who have stimulated me to research my beliefs and find out just why I hold to them (or sometimes to realize my belief was in error!) Stimulating someone to explain why they believe something is fine. Most people who get in trouble (Christians and non-Christians alike) get in trouble when they start going from asking "why...", to comments that accuse the poster of lying, being stupid, purposely holding to false beliefs, and other things that are considered personal attacks or belittling them. There is always a way to interact without these things.
We only ask that you remember this IS a Christian web site and being a private site we do restrict non-Christians from any comments intended to put down Christianity or intended to draw our Christian members away from their faith. We also watch for and remove disguised attempts to do this as well. But since you've read the ToS and understand it (thank you!!!), I can't see why you would have to say goodbye. Other non-Christians have done fine here and have been able to stay within the rules. I hope you will give us a chance.