i can say 'there is no god' and it doesn't require any faith to do so. i can also say 'there are no ghosts' and 'there are no aliens' and that requires no faith.
the burden of proof is on religions. until they have proof, saying 'there are no god, ghosts, or aliens' are the obvious and default rational beliefs.
atheism is the default natural state. any child raised in a religious vacuum would be an atheist.