Just wondering... What happens to the Jews, and the other 3 billion or so who don't believe in/know about Christ?
Short answer is that, while it is not given to us to know what happens to any given individual (because we cannot know whether they have truly accepted the claims of Christ), but we do know that as to those to whom the claims of Christ have been presented, only those who accept Him will have Life Eternal.
God does not distinguish among the group self-identifications which men make. So, whether a man calls himself a 'jew', 'buddhist', 'catholic', 'baptist' or whatever, those are the rules which He outlined.
Now as to those who never hear of Christ (the old question of 'the native in darkest Africa'), Paul said, "For since the creation of the world His invisible attributes, His eternal power and divine nature, have been clearly seen, being understood through what has been made, so that they are without excuse." [Rom. 1:20]
Thus, God evaluates those who haven't heard of Christ on some other standard based upon their knowledge of Him from the display of His attributes in creation. We don't know exactly how that would work, but I am sure He does. Which is all that matters.