If God/Jesus can read our hearts...knows what we would do with his knowlege if he shared it with us...he MUST contact people who previously knew nothing about him. If not....why not? Wouldn't that be unfair on people simply because they were born in the wrong part of the world, and weren't taught about him?
If the Bible account of God appearing to Cornelius in vision is true, then God should have no problem doing that a lot. And yet.....