There are things mere humans were not meant to know, and whether Eve was fucked hard doggy style by some guy from Mars is one of them. Combining alien DNA with the DNA of Christ and breeding alien-Christ mutants is also against His rules. Than to Forgive An Alien For Turning Your Sister Into a Pod Person. Breed, and let breed. Let he who is without the desire to exterminate the human race cast the first stone.
Aliens are people, too.
If you ever feel uncertain about how to deal with a difficult situation, think of Abraham. Take two Hail Marys and call me in the morning. Seek Not to Discover God's Alien-Engineered Android Nature, And if You Do, Do Not Program Him to Walk into Walls. God is not a robot. I repeat, God is not a robot.