Are all atheists this ill-informed about religion?

[Esquilax]

But since you brought it up, tell me, what are the different views on what it takes to get to heaven?

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"?