In our own time, most Christians are in denial about these difficulties. The few contemporary theologians who dare to pronounce on the subject usually shrug it aside with the comment that the existence of intelligent aliens would not pose a problem for Christianity. But it would pose a problem, and a huge one at that. The Church would do well to take it seriously and to fundamentally revise its salvation narrative ahead of any discovery.
Yes, because it is always wise to change the gospel handed down from the Apostles because someone is shouting he’s over there?!? (Luke 17:23) [Snark mode off]