How do you account for the other two thirds of people who don't believe in Christianity and commonly believe things directly contradictory to it?
There are also various Christian's who believe that other Christian's who follow Christianity the wrong way will go to hell.
I can't upvote this point enough.
And more worryingly, with the Christians I have spoken to, those who are more consistent in their beliefs and actually update the rest of their beliefs on them (and don't just have "Christianity" as a little disconnected bubble in their beliefs) are overwhelmingly in this category, and those who believe that most Christians will go to heaven usually haven't thought very hard about the issue.
r/Fitness does a weekly "Moronic Monday", a judgment-free thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. I thought this seemed like a useful thing to have here - after all, the concepts discussed on LessWrong are probably at least a little harder to grasp than those of weightlifting. Plus, I have a few stupid questions of my own, so it doesn't seem unreasonable that other people might as well.