On Non-belief

[FallentoReason]

1) If God exists, he desires for us to know x is true, where x is the set of propositions we need to believe in so that we can be saved.
2) If God exists, he has the power to make us know x is true.
3) If God exists, and given (1) & (2), we should know x is true.
4) We do not know x is true.
C) Given (3) & (4), God does not exist.

This is really good for most Christian groups, but knowledge does not lead to salvation. That heresy is called "gnosticism" and was the merge of Platonic philosophy and Christianity.

Chad falls for most of it =p

However, non-gnostic Christians do not believe that salvation comes from knowledge. In fact, the bible says that the demons know God exists, but they are obviously not good.

There's a subtlety that you're not picking up on. If God is 'omniscious' (has the 3 omnis as attributes) then he is capable of making us know beyond doubt that the Bible is true. What we do about this knowledge is a whole different story, as you rightly pointed out how the Bible says demons know God exists but they still rebel.