It sounds like your trying to create your version of heaven in an island. I don’t think Christians were called to isolate themsleves. Just look at where the first Christians went to? The went to Rome. A sure place to go if you want to be persecuted. Do you think the early christians knew this? But of course they did. A good question to ask yourself is why would christians go into hostile territory to preach the Word of God?
Let me know your thoughts.