What is nihilism and how is related to the death of God?

nihilism means to not have beliefs. and it is not related to the actual physical death of god, but rather the death of the idea of god. if someone is a nihilist, that means they dont believe in a god. so the more nihilists there are, the fewer people there are who believe in god. if everyone was nihilistic, there would be no belief in god, and so the idea of god would cease to exist or "die".