Many people believe that God is eternal...that He always existed and always will.
People used to believe that the sun moved around the earth.
People used to believe that blood-letting helped bring balance to the body and cured disease.
People used to believe that having your picture taken would cause you to lose a part of your soul.
Beliefs are useless when held in the absence of evidence - and evil when held contrary to evidence.
So some people believe "God is eternal." So what? Since when is truth something that's up to a vote? Besides, I'll bet you money that many of those people who believe that can't answer the simple question "
what is it that you believe in?" and the inevitable follow-ups "
what is this God you speak of?" and "
how did you gain this knowledge?"