Are all atheists this ill-informed about religion?

[Bob Kelso]

Can I get to heaven through good deeds, or am I locked out because I lack faith? Am I going to hell because I'm an atheist, or am I just going to be separated from god? Purgatory? What's hell like? Can practitioners of different religions get into heaven? Can practitioners of different sects of christianity get into heaven? How are sins interpreted by god? If you're saved once, are you always, or does it fade?

I have heard both answers to every one of those questions from christians. Each and every one of them acted as though the opposing answer was simply foolish. So, is this central tenet of christianity, that you labelled "of utmost importance," in another thread just another "peripheral doctrine"?

Which denomination says that good deeds are necessary or sufficient to get you to heaven? Which denomination says practitioners of different religions get into heaven? And which denominations say other sects of Christianity don't get into heaven? 

There's 40,000 denominations, atheists love telling me. There's sooo muchhhh doctrinal differences atheists love telling me. Now give me some specifics! 

Convince me this is more than an atheist fairytale. I want to believe.

Do you not know how to use google? 

A comparison of the main 7, and a Q&A from Church Relevance.