Believe what you want, you don't KNOW whether he exists or not.
I believe in unicorns and flying spaghetti monsters.
Prove me wrong.
Oh right, we made unicorns and fairies and mermaids up.
Just like we made religion up as an explanation.
BTW if life started 6,000 years ago (according to the oh so believable bible) where the heck did the dinosaurs go?