How should Christians react to extraterrestrial intelligent life?

[Phidippides]

What would happen if we ever encountered intelligent alien life?  Would it change people's views on Christianity or Christ's redeeming plan?  I am pretty confident that first contact would cause one of the most massive developments of theological literature the world has ever seen. 

In any case, this article has some theories about how different religions would handle such an event:

https://getpocket.com/explore/item/how-will-our-religions-handle-the-discovery-of-alien-life

[Donald Baker]

It would mess up a lot of folks and is one of the reasons Satan might try to fake an alien invasion himself.

[Phidippides]

What would you think about it if it were a real arrival of aliens?

[Donald Baker]

It would be exciting at first.  Then it would hit me that humanity isn't as special as I thought it was.

[Phidippides]

Oh really?  But if you found out that Christ came here, to Earth, and other planets that were not so fortunate needed to be converted, wouldn't that make humanity even more special?

[Donald Baker]

Or more sinful and vile.....

[Phidippides]

Well, possibly, but it is still always the case that the benefit of knowing Christ is better than the detriment caused by sin.

It reminds me of my church's liturgy on Easter Vigil that is sung at candlelight every year, which proclaims, "O truly necessary sin of Adam, / destroyed completely by the Death of Christ! / O happy fault that earned so great, so glorious a Redeemer!"  It sounds a bit strange to frame it this way, but I think it is intended to underscore the extreme privilege humanity received to have God become Man.