Many Christians who take every word in the Bible literally dismiss the possibility of alien races on other planets in spite of the fact that there are probably around 10^24 habitable planets in the observable universe and many more beyond that.
Personally, I think aliens do exist, whether Christ died for their sins or not, or whether he placed the same rules upon them is anyone’s guess. I don’t think anybody has a perfect understanding of God, anymore than an ant can hope to understand us. However, this much I believe is true:
34 Then Peter opened his mouth, and said, Of a truth I perceive that God is no respecter of persons: 35 But in every nation he that fears him, and works righteousness, is accepted with him.
I don’t know everything there is to know about God, and probably a lot less than other human beings, but I do know that God is loving, and I believe his love is universal.