As I sit here chuckling over this thread's responses, I would like to point out the opening remarks ... "According to various interpretations within Christianity, God must be an Alien because..."
I never said that I believe "god" is an alien. Yet, it does seem very possible to me that if the accounts and interpretations of "god" (as described through the Bible) are true, then "god" could indeed be an alien. In fact, I believe that is the most plausible explanation for "god's" behavior.