Perhaps this would be best asked of Zeus, Apollo, Thor, Aphrodite (who may be an E2 regular, hmmm), Jupiter and all the others. Their "flock" strayed centuries ago. Now they only exist in Dungeons and Dragons games or history books. They were Gods in their time, and people believed in them with the same fervor that folks now believe in Allah, Jehovah and "God". If a God's power is derived from his/her/its followers, does that God de-exist when they lose their flock? If we discover and meet an alien civilization, this will contradict a lot of what is in the Bible. Will this be the inevitable slide towards extinction for todays Gods, just as those classical Gods that came before him/her/it?